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336 worksheet templates, every one in 6 difficulty levels, free to print. Build-your-own and slideshows are coming soon.

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Addition

Practice problems with room to work them out.

ages 5+Make one

Subtraction

Take-away practice with answer boxes.

ages 5+Make one

Multiplication

Times-table practice plus word problems.

ages 7+Make one

Division

Sharing and grouping with answer boxes.

ages 8+Make one

Fractions

Shade, name, and compare fractions.

ages 7+Make one

Place Value

Tens, ones, hundreds, and ordering numbers.

ages 6+Make one

Telling Time

Read and write times to the hour and half hour.

ages 6+Make one

Money Math

Add up dollars and cents and make change.

ages 6+Make one

Missing Numbers

Fill the gaps in the sequence.

ages 5+Make one

Word Problems

Real-life math with space to show your work.

ages 6+Make one

Shapes & Geometry

Name shapes, count sides, and draw them.

ages 3+Make one

Counting & Numbers

Count the objects and write how many.

ages 3+Make one

Skip Counting

Count by 2s, 5s, and 10s.

ages 5+Make one

Patterns

Spot the pattern and what comes next.

ages 3+Make one

Matching

Draw a line to connect the pairs.

ages 3+Make one

Reading Comprehension

Read the passage, then answer the questions.

ages 6+Make one

Phonics & Sounds

Beginning sounds and simple CVC words.

ages 4+Make one

Sight Words

Trace, write, and use this week's words.

ages 5+Make one

Rhyming Words

Match and finish the rhymes.

ages 4+Make one

Spelling

Practise this week's spelling list.

ages 5+Make one

Fill-in-the-Blank Story

Complete the story using the word bank.

ages 6+Make one

Creative Writing

A fun prompt and lines to write a story.

ages 6+Make one

Grammar

Nouns, verbs, capitals, and punctuation.

ages 6+Make one

Sentence Building

Turn words into full sentences.

ages 5+Make one

Letter Tracing

Trace the letters, then write them.

ages 3+Make one

Number Tracing

Trace numbers and practise writing them.

ages 3+Make one

Line Tracing

Pre-writing lines and curves.

ages 3+Make one

Draw & Label

Draw it, then label the parts.

ages 4+Make one

Color by Number

Solve, then color by the answer.

ages 4+Make one

Life Cycle & Science

Draw and label how something grows.

ages 5+Make one

The Machine Made of Beads

The ancient counting tool that keeps up with a calculator, and can teach your brain to add without one.

ages 3+Open it

The Acorn With a Whole Tree Inside

The little nut in a scaly cap that carries an oak tree in its pocket, and the squirrels and jays that plant forests by forgetting.

ages 3+Open it

How Something That Heavy Stays Up

A machine heavier than a house holds itself in the sky by throwing air at the ground, and the hardest part was never the engine.

ages 3+Open it

Is Anybody Out There?

Nobody has ever found an alien. This is the true story of how hard people are looking, and what they would accept as proof.

ages 3+Open it

The Hospital That Comes to You

A room with an engine bolted to the front, built so the help arrives before you do.

ages 3+Open it

The Ant That Never Gets Lost

Smell trails, underground farms, bridges built from living bodies, and a desert ant that counts its own steps home.

ages 3+Open it

The Apple That Won't Copy Itself

Plant a seed from your favorite apple and you get a stranger. Every Granny Smith on Earth is a cutting from one tree.

ages 3+Open it

The Star Sailors Who Never Stop Falling

Astronaut means star sailor. They fall around the Earth sixteen times a day, and they train for years to do it.

ages 3+Open it

The Tiny Thing Everything Is Made Of

Atoms are so small you will never see one, and so empty that you have never actually touched anything.

ages 3+Open it

The Axolotl That Never Grew Up

The smiling salamander that keeps its baby gills for life, and can regrow a whole leg.

ages 3+Open it

The Balloon That Went to the Edge of the Sky

Tree sap, a gas we found in the sun, and the reason a party balloon is really a machine.

ages 3+Open it

The Banana That Is Not From a Tree

The world's favorite fruit is a berry, it grows on a giant herb, and nearly every one you eat is a clone.

ages 3+Open it

The Ball That Started in a Peach Basket

One cold winter, a bored class, and a peach basket nailed to a railing. That is how basketball began.

ages 3+Open it

The Mammal That Flies With Its Hands

The only mammal with true flight, hunting in the dark by shouting and listening to the echoes.

ages 3+Open it

The Battery That Started as a Stack of Coins

Inside every battery is a slow chemical argument that pushes electrons through your wires. It began in 1800 with zinc, copper, and salty cardboard.

ages 3+Open it

The Beach Is Always Moving

Sand that used to be a mountain, waves that carry energy instead of water, and a shoreline that quietly walks down the coast.

ages 3+Open it

The Bear That Sleeps Through Winter

Seven months with no food, no water, and no bathroom, and it comes out with its muscle and bone intact.

ages 3+Open it

The Beaver That Builds Its Own Pond

Orange chisel teeth, a tail like a paddle, and a wall of sticks that turns a stream into a whole world.

ages 3+Open it

The Bee That Dances Directions

A bee finds the flowers, flies home in the dark, and dances a map on the wall of the hive.

ages 3+Open it

The Bicycle That Taught Us to Fly

No engine, no fuel, just you. The most efficient machine ever built, and the bike shop that put the first airplane in the air.

ages 3+Open it

The Bird That Has to Learn Its Song

A songbird is not born knowing its song. It listens, it babbles, it practices for weeks, and it sings with an instrument you do not have.

ages 3+Open it

The Boat That Sails Into the Wind

Why a heavy steel ship floats, how a tight sail becomes a wing, and how sailors learned to climb toward a wind they cannot point at.

ages 3+Open it

The Book That Took 5,000 Years to Make

Clay tablets, reed scrolls, a year of one person's handwriting, and the machine that finally made books cheap.

ages 3+Open it

The Dinosaur With Arms Longer Than Its Legs

Arm lizard: the giant that reached the treetops, and the world-famous skeleton that turned out to be a different dinosaur.

ages 3+Open it

The Squishy Machine Inside Your Head

Three pounds of soft gray tissue that burns a fifth of your energy, rewires itself while you sleep, and cannot feel a thing.

ages 3+Open it

The Bread That Was Alive

Every hole in a slice of bread is a room a living thing built, then died inside.

ages 3+Open it

The Broccoli That Was Never Wild

The green vegetable people built from a bitter wild plant, one flower bud at a time.

ages 3+Open it

The Caterpillar That Turned Itself Into Soup

How one animal eats leaves as a caterpillar, dissolves itself inside a green case, and rebuilds into a butterfly.

ages 3+Open it

The Caterpillar That Turned to Soup

How a leaf-chewing caterpillar digests its own body inside a chrysalis and rebuilds itself into a butterfly that tastes with its feet.

ages 3+Open it

The Plant That Keeps Its Own Rain

How a cactus stores a whole rainstorm inside its stem and stands for 150 years in a place where it almost never rains.

ages 3+Open it

The Cake That Is Mostly Air

A cake is a foam. Every bubble in it is made in the mixing bowl, before the oven ever gets involved.

ages 3+Open it

The Camel That Carries Its Lunch on Its Back

The hump is not a water tank, and the camel is not really a desert animal. Two famous facts, both wrong.

ages 3+Open it

The Campfire That Burns Old Sunlight

Why flames float above the log, why coals glow, and how a fire hands back sunlight a tree stored years ago.

ages 3+Open it

The Canoe That Crossed an Ocean

The oldest kind of boat we know of, a hollowed log that still floats after ten thousand years, and how a single paddle turns a push into a journey.

ages 3+Open it

The Machine That Carries Its Own Push

Four wheels, a controlled explosion, and a stack of decisions made by people who never met you.

ages 3+Open it

The Carrot That Used to Be Purple

Carrots were purple and yellow for centuries, and the orange part we eat is really the plant's hidden lunchbox for a spring it never gets to see.

ages 3+Open it

The Castle That Was Really a Machine

Pointed towers and little flags, and the cold stone machine underneath: ditches, arrow slits, and the day cannons ended all of it.

ages 3+Open it

The Cat That Let Itself In

The small hunter that walked into our grain sheds 10,000 years ago and never left, with mirror eyes, swiveling ears, and a tongue full of hooks.

ages 3+Open it

The Caterpillar That Rebuilds Itself

A soft green eating machine with twelve tiny eyes that dissolves almost everything it is, then builds a butterfly out of the leftovers.

ages 3+Open it

The Cave That a Raindrop Built

Nobody dug the cave. Rain dissolved it, one drop at a time, and then left stone icicles behind.

ages 3+Open it

The Tiny Rooms You Are Made Of

Every living thing is built from cells, and the man who named them was squinting at a piece of cork.

ages 3+Open it

The Truck With a Deadline Inside It

The spinning drum on a cement mixer is racing a chemical reaction, and if it ever stops, the whole load turns to stone.

ages 3+Open it

The Lizard That Talks in Color

The chameleon does not hide. It broadcasts, with a skin full of crystals and a tongue that fires like a drawn bow.

ages 3+Open it

The Cheese With Holes You Can See Through

How milk becomes cheese, and why the holes in Swiss cheese are called eyes.

ages 3+Open it

The Cat That Runs Faster Than a Car

The fastest animal on land, built like a race car, that cannot roar and chirps like a bird instead.

ages 3+Open it

The Tallest Hat in the Kitchen

Why chefs wear that hat, why kitchens run like an army, and what really happens when food turns brown.

ages 3+Open it

Twenty One Days Inside an Egg

How a warm egg turns into a peeping chick, and how that chick becomes a hen that lays eggs of her own.

ages 3+Open it

The Bird That Walked Out of the Jungle

A shy forest bird became the most numerous bird on Earth. It grinds its food with stones, talks through its own eggshell, and is a living dinosaur.

ages 3+Open it

The Loop That Makes the Light Come On

A battery, a wire and a bulb. How a closed loop turns a push into light, and how that loop became the chip in your phone.

ages 3+Open it

The Clock That Started as a Shadow

From a stick in the dirt to an atom that keeps time better than the Earth does.

ages 3+Open it

The Cloud That Weighs a Million Pounds

It looks like cotton and floats like nothing. A puffy cloud holds about a million pounds of water, and every drop of it is falling right now.

ages 3+Open it

The Fish That Lives Inside a Sting

The clownfish sleeps in a sea anemone's stinging arms, and every clownfish is born male.

ages 3+Open it

The Bird That Learned to Open the Bin

The loud white parrot with a crest it can raise like a flag, a beak that cracks anything, and a habit of teaching its neighbors new tricks.

ages 3+Open it

The Dirty Snowball That Grows a Tail

A ball of ice older than Earth, and what happens to it when it finally gets close to the sun.

ages 3+Open it

The Needle That Knows Which Way Is North

A magnetized needle, a planet full of churning iron, and the small tool that let people cross oceans without seeing the sky.

ages 3+Open it

The Cookie That Refused to Melt

The sweet treat that turns science into a snack, and how chocolate that would not melt away made it famous.

ages 3+Open it

The City Built by Tiny Animals

A coral reef is not a rock and not a plant. It is a city built by soft little animals, one stone cup at a time.

ages 3+Open it

The Grass That Cannot Plant Itself

Corn is a plant people built out of a scruffy wild grass, and it can no longer survive a single season without us.

ages 3+Open it

The Cow That Cannot Digest Grass

No cow has ever been able to digest a blade of grass. The trick is who she keeps inside her.

ages 3+Open it

The Crab That Climbs Out of Its Own Shell

A crab wears its skeleton on the outside, so to get bigger it has to back out of its own body first.

ages 3+Open it

The Bat That Started as a Willow Tree

The flat willow paddle that starts as a tree, gets knocked in with a mallet, and hits a rock-hard ball on its sweet spot.

ages 3+Open it

The Crocodile That Outlasted the Dinosaurs

The floating log with the strongest bite on Earth, a soft mouth for carrying babies, and 200 million years of practice.

ages 3+Open it

The Heaviest Hat in the World

Gold that never rusts, a ruby that turned out not to be a ruby, and the Roman crown made of grass.

ages 3+Open it

The Rocks That Build Themselves

Salt cubes, six-armed snowflakes, and a cave in Mexico where crystals grew longer than a school bus.

ages 3+Open it

Half the World Is Always Dark

The sun never rises. Earth rolls you into the light, once every twenty four hours, forever.

ages 3+Open it

The Deer That Grows a New Crown Every Year

Antlers are real bone. A deer builds a whole set every spring, uses them, drops them in the snow, and starts over.

ages 3+Open it

Open Wide: The Story of the Dentist

Why we visit the dentist, how teeth really decay, and how one French doctor turned tooth-pulling into tooth-saving.

ages 3+Open it

The Digger That Lifts With Oil

The yellow machine that borrows all of its strength from trapped oil, and stands perfectly still while it moves the world.

ages 3+Open it

The Egg That Turned to Stone

The biggest dinosaurs laid eggs a child could hold, and the animal we called an egg thief was really a parent sitting on its own nest.

ages 3+Open it

The Twisted Ladder Inside You

Four letters, three billion of them, coiled inside almost every cell. How DNA holds the instructions for building a living thing, and how we learned to read them.

ages 3+Open it

The Doctor Who Rolled Up Paper to Hear a Heart

The stethoscope was invented from a rolled sheet of paper by a shy doctor in Paris, and it turned listening into a way of seeing.

ages 3+Open it

The Dog That Learned to Read Us

The nose that smells time, the eyes that read your face, and the wolf that decided to stay.

ages 3+Open it

The Dolphin That Sees With Sound

A land mammal that walked into the sea, named itself, and learned to hunt with a sponge on its nose.

ages 3+Open it

The Donkey That Stops to Think

Everyone calls it stubborn. It is actually running a risk assessment, and it has been carrying the world's loads for 7,000 years.

ages 3+Open it

The Dragon Everybody Made Up

The animal that never existed, and yet almost every country on Earth built a story around it.

ages 3+Open it

The Dragonfly That Never Misses

The insect that spends years hunting underwater, then comes up with four wings and catches almost everything it aims at.

ages 3+Open it

The Drum That Learned to Talk

How a stretched skin turns a hit into a boom, why one West African drum can speak in sentences, and how teenagers hammered a brand new instrument out of oil barrels.

ages 3+Open it

Water Off a Duck's Back

The bird that sits on freezing water all day, stays bone dry, and sleeps with half its brain awake.

ages 3+Open it

The Eagle That Isn't What You Think

The bird on the flag steals its dinner, squeaks instead of screams, and once came within 417 pairs of vanishing.

ages 3+Open it

The Snail Inside Your Ear

How the curl on the side of your head catches sound, and why there is a snail-shaped tunnel hidden behind it.

ages 3+Open it

The Hot Heart Under Your Feet

Straight down from your shoes is a ball of iron as hot as the surface of the sun, and nobody has ever seen it.

ages 3+Open it

The Blue Planet We Named After Dirt

The only world we know with liquid water and life, spinning at a thousand miles an hour without you feeling a thing.

ages 3+Open it

The Spiky Mammal That Lays an Egg

A spiky Australian animal with no teeth, an electric sense in its nose, and an egg about the size of a grape.

ages 3+Open it

The Egg That Builds a Bird

A shell thinner than a coin, shaped like an arch, holding everything a chick needs to build itself.

ages 3+Open it

The Elephant That Listens With Its Feet

The biggest animal on land: a nose with no bones in it, teeth on a conveyor belt, and rumbles you feel through the ground before you hear them.

ages 3+Open it

The Bird That Gave Up the Sky

Australia's six-foot running bird: the dad who sits on the nest for eight weeks, and the war the army lost.

ages 3+Open it

The Eye That Sees Upside Down

Every picture that lands inside your eye is upside down and backwards, and there is a hole in your vision you have never noticed.

ages 3+Open it

The Fairy in the Bluebell

The tiny winged folk of old stories, the real mushroom rings they were blamed for, and the photographs that fooled the world.

ages 3+Open it

The Farmer Who Plants a Guess

The oldest job on Earth. A person who bets on the weather, reads the soil, and quietly redesigned wheat, corn, and half the planet.

ages 3+Open it

The Fern That Waits for Rain

A plant with no flowers and no seeds, older than the dinosaurs, that unrolls its leaves like a scroll and cannot make a single new fern without water.

ages 3+Open it

The Red Truck That Is Really a Pump

A fire engine only carries a few minutes of water. The real machine is the pump hiding under the paint.

ages 3+Open it

The People Who Run Toward the Fire

The gear, the three things every fire needs, and the three minutes a family gets to reach the door.

ages 3+Open it

The Beetle That Carries a Lantern

It is not a fly, it does not get hot, and every blink in the dark is a password.

ages 3+Open it

How a Fish Breathes Water

Water holds barely any air, and a fish pulls it out anyway. Gills, the line down its side, and why a lungfish is your cousin.

ages 3+Open it

The Bird That Eats Its Own Pink

The bird that hatches gray and eats its way to pink, then feeds upside down in lakes almost nothing else can use.

ages 3+Open it

The Flower That Drinks With Its Feet

Roots that drink, a stem with no pump, leaves that build sugar out of thin air, and petals that are really just a sign for bees.

ages 3+Open it

How a Flower Knows It Is Spring

A flower has no eyes and no calendar, but it measures the dark, remembers the winter, and opens right on time.

ages 3+Open it

The Flute That Started With a Bone

No reed, no strings, just a person blowing across a hole. The flute is the oldest instrument we have ever found.

ages 3+Open it

The Plate That Tells You What to Eat

The picture that replaced the food pyramid, and the real reason half of it is fruits and vegetables.

ages 3+Open it

The Forest Under the Forest

Half of every forest is underground, where roots and fungal threads trade food in the dark.

ages 3+Open it

The Dinosaur That Turned to Stone

How a buried dinosaur becomes solid rock, and why almost none of them ever do.

ages 3+Open it

The Tilt That Makes the Seasons

Earth leans over as it circles the sun, and that small lean gives us spring, summer, fall, and winter.

ages 3+Open it

The Fox That Hunts by Ear

A dog that stalks like a cat, hears a mouse through snow, and lives on more of the Earth than any other wild hunter.

ages 3+Open it

The Tadpole That Ate Its Own Tail

How a swimming, gill-breathing tadpole takes itself apart and rebuilds into a frog.

ages 3+Open it

The Frog That Swallows With Its Eyes

It blinks its dinner down its throat, breathes through its skin, and one kind freezes solid every winter and starts again in spring.

ages 3+Open it

The Galaxy We Live Inside

The pale road across the night sky is our own galaxy, seen from the inside, and we can never step out to look at it.

ages 3+Open it

The Truck That Eats Our Trash

The big machine that grabs your bin, crushes the trash, and keeps the whole street clean.

ages 3+Open it

The Wheel That Grew Teeth

Wheels with teeth that grab each other, trade speed for muscle, and quietly run almost every machine you own.

ages 3+Open it

The Tiny Living Things You Cannot See

Germs are everywhere, most of them are harmless, and it took people two hundred years to work out that a few of them make us sick.

ages 3+Open it

The Giraffe and the Trees That Fight Back

The tallest animal on Earth, the seven bones in its neck, and the acacia trees that warn each other it is coming.

ages 3+Open it

The River of Ice That Moves While You Sleep

How falling snow turns into blue ice heavy enough to carve a valley, and why it never stops flowing downhill.

ages 3+Open it

The Goat With Rectangle Eyes

Sideways pupils that swivel, hooves that grip like climbing shoes, and a stomach that runs on borrowed microbes.

ages 3+Open it

The Goldfish That Never Forgets

Everyone says it forgets in three seconds. It remembers for months, it started out gray, and it can survive a frozen pond by turning its own waste into alcohol.

ages 3+Open it

The Goose That Knows the Way

Why geese fly in a V, why a gosling will follow the first thing it sees, and how one goose crosses the Himalayas.

ages 3+Open it

The Gorilla That Makes a New Bed Every Night

The biggest ape on Earth is a slow, leaf-eating giant that hums while it eats and bends a fresh bed of branches every single evening.

ages 3+Open it

The Fruit That Grows on Borrowed Roots

Grapes climb by feel, stop sweetening the second they are picked, and nearly all of them grow on roots borrowed from another continent.

ages 3+Open it

The Bug With a Spring in Its Knee

The insect that cannot jump with muscle alone, so it loads a catapult in its own leg instead.

ages 3+Open it

The Guinea Pig That Is Not a Pig

It is not a pig and it is not from Guinea. It is a mountain animal from Peru that whistles at people.

ages 3+Open it

The Box That Sings

Six strings, a hollow box, and some very old math. How a guitar turns the shiver of a wire into a sound you can feel.

ages 3+Open it

The Shark With a Hammer for a Head

The shark that swings its head over the sand like a metal detector, and finds a stingray hiding underneath.

ages 3+Open it

The Hamster With Pockets in Its Cheeks

The night worker that stuffs its face with seeds, digs a pantry underground, and is named after a word that means to hoard.

ages 3+Open it

The Toolbox at the End of Your Arm

Twenty seven bones, no muscles in the fingers, and a thumb that made every tool humans ever built.

ages 3+Open it

The Pump That Never Quits

The fist-sized muscle in your chest, the little doors that go lub-dub, and the man who proved blood travels in a circle.

ages 3+Open it

The Hedgehog With Five Thousand Spines

The small night animal that folds itself into a ball of spines, and paints its own back with foam for reasons nobody can explain.

ages 3+Open it

The Machine That Can Stand Still in the Sky

A helicopter carries its own wind. Its wings spin, so it never has to move forward to stay up.

ages 3+Open it

The Crab That Wears a Borrowed Shell

It never grows a shell of its own. It moves into an empty one, and when it outgrows that, a whole line of crabs swaps houses at once.

ages 3+Open it

The River Horse That Cannot Swim

The two-ton animal that sinks instead of floating, makes its own sunscreen, and feeds the whole river.

ages 3+Open it

The Sweet Gold That Never Goes Bad

How bees turn flower nectar into gold, why honey never spoils, and the tiny chemist hidden inside every bee.

ages 3+Open it

The Horse That Sleeps Standing Up

The animal that dozes on its feet, walks on a single toe, and vanished from America before sailing back.

ages 3+Open it

The Balloon That Flew a Sheep, a Duck, and a Rooster

How a bag of hot air lifted three farm animals over a king's palace, and why balloons still have no steering wheel.

ages 3+Open it

Why Your House Doesn't Fall Down

Every wall, beam and roof in your house is doing a job. Here is how a house holds itself up, keeps the weather out, and why houses look different everywhere.

ages 3+Open it

The Body That Never Stops Working

The heart, bones, brain, and skin that keep you running every second, even while you sleep.

ages 3+Open it

The Bird That Flies Backward

The smallest bird on Earth hovers on a figure-eight wingbeat, drinks with a tongue that snaps shut, and shuts its own body down every night.

ages 3+Open it

The Ice Cream That Never Freezes Solid

Why a scoop stays soft in a freezer cold enough to turn water into rock, and why a third of it is air.

ages 3+Open it

The Iceberg That Hides Most of Itself

A floating mountain of ancient snow that keeps nine tenths of itself under the sea.

ages 3+Open it

The House Made of Snow That Keeps You Warm

How Inuit builders turn wind packed snow into a dome that holds your body heat while it hits forty below outside.

ages 3+Open it

The Island That Rose Out of the Sea

How islands are built from the deep sea floor, how life finds them, and why they hold creatures that live nowhere else.

ages 3+Open it

The Jellyfish With No Brain and No Bones

An animal that is mostly seawater, has no brain at all, and has been drifting the ocean since before there were trees.

ages 3+Open it

The Planet Where the Storm Never Stops

The biggest planet in the solar system, its ninety-odd moons, and a storm wider than Earth that has been spinning for longer than anyone alive.

ages 3+Open it

The Kangaroo That Bounces for Free

The animal with springs in its ankles, a fifth leg for a tail, and a newborn the size of a jellybean.

ages 3+Open it

The Wing That Is Not Allowed to Leave

A kite is the oldest flying machine on Earth, and the whole trick is the string.

ages 3+Open it

The Bird With Its Nose on the Wrong End

The flightless New Zealand bird that hunts by smell in the dark and lays an egg a fifth of its own size.

ages 3+Open it

The Knight Who Started Out as a Kid

Real knights began training at seven, and their steel suits were far lighter than the movies pretend.

ages 3+Open it

The Koala That Sleeps All Day

The bear that is not a bear, the leaves that would poison almost any other animal, and why twenty hours of sleep is the price.

ages 3+Open it

The Bird That Laughs at Dawn

A kingfisher that almost never fishes, and whose famous laugh is really a fence made of sound.

ages 3+Open it

The Ladybug That Was Once a Tiny Dragon

Four bodies, one insect. How a yellow egg becomes a spiky aphid hunter, then a spotted red beetle.

ages 3+Open it

The Ladybug Is Not a Bug

The red beetle that folds its wings like origami, bleeds on purpose, and once saved California's orange trees.

ages 3+Open it

The Leaf That Eats Sunlight

How a flat green scrap of a tree feeds the whole forest, lifts water a hundred feet with no pump, and turns red on its way out.

ages 3+Open it

The Lemon That Saved Sailors

The sour yellow fruit that once guarded sailors from a deadly sickness, cleans a kitchen, and can even power a tiny battery.

ages 3+Open it

The Cat That Carries Dinner Up a Tree

The spotted cat that hauls a whole antelope into the branches, and lives in more places than any other wild cat.

ages 3+Open it

The Tiny Wire That Turned On the Night

Inside an old light bulb is a thread of metal hotter than a campfire, and one bulb in California has been glowing since 1901.

ages 3+Open it

The Tower That Talks to Ships

A tall stone tower, a lens made of rings, and a light that tells sailors exactly where the rocks are.

ages 3+Open it

The Spark That Splits the Sky

A spark five times hotter than the surface of the sun, and the bang it leaves behind.

ages 3+Open it

The Only Cat That Lives in a Family

Almost every cat on Earth hunts alone. The lion is the one exception, and biologists have argued for fifty years about why.

ages 3+Open it

The Lizard That Leaves Its Tail Behind

A tail that snaps off on purpose, feet that stick to glass, and a body that runs on sunshine.

ages 3+Open it

The Llama That Carried an Empire

The humming, spitting mountain animal that hauled the Inca world on its back, and still refuses to carry one pound too many.

ages 3+Open it

The Lobster With Teeth in Its Stomach

The armored sea bug that tastes with its feet, grinds its food after swallowing, and has to climb out of its own body to grow.

ages 3+Open it

The Tree That Grows Inside Your Chest

Two spongy bags, hundreds of millions of tiny air sacs, and a muscle that pulls the whole sky into your chest.

ages 3+Open it

The Rock That Knows Which Way Is North

The invisible pull that steers ships, lights the sky, and quietly runs almost every machine you own.

ages 3+Open it

The Planet That Rusted Red

Why Mars is the color of an old nail, what its dried-up rivers prove, and why half the robots we send there never make it down.

ages 3+Open it

The Gold Medal That Is Not Really Gold

The shiny prize you wear around your neck, and the surprising truth about what it is made of.

ages 3+Open it

The Meerkat on Guard Duty

The two-pound desert digger that posts a lookout, barks a different warning for every danger, and teaches its pups to hunt scorpions.

ages 3+Open it

The Mermaid That Was Really a Sea Cow

The half-fish woman sailors kept seeing, and the gentle sea animal that was really there.

ages 3+Open it

The Rock That Turns Into Light

A space rock the size of a pea can write a line of fire across the sky. Here is how, and the three names it gets on the way down.

ages 3+Open it

The Tube That Found a Hidden World

Two pieces of curved glass in a tube, and suddenly a drop of pond water was crowded with living things nobody knew were there.

ages 3+Open it

The Only Food Made to Be Food

Why milk is white, why most grown-ups cannot digest it, and how one drink rewrote human DNA.

ages 3+Open it

The Monkey With a Hand for a Tail

Some monkeys grow a fifth hand out the back. It can hold their whole weight, or pick up a single grape.

ages 3+Open it

The Moon Is Always Round

The moon never changes shape. It is a lit ball of rock, and every night you see it from a new angle.

ages 3+Open it

The Moon Only Shows Us One Face

Why the same side of the Moon always faces Earth, and what was hiding on the side nobody had ever seen.

ages 3+Open it

The Moose That Grows a New Crown Every Year

The biggest deer on Earth, with antlers it throws away every winter and rebuilds every spring.

ages 3+Open it

The Moth That Flies by the Moon

The fuzzy night flier that smells with feathers, jams bat sonar, and cannot stop circling your porch light.

ages 3+Open it

The Two-Wheeled Machine That Won't Fall Over

How a motorcycle balances on two wheels, why riders steer the wrong way to turn, and where the whole idea began.

ages 3+Open it

The Mountain That Is Still Growing

How crashing plates fold the ground upward, why the top is always cold, and why the highest rock on Earth is full of seashells.

ages 3+Open it

The Mouse That Sees With Its Face

The little gray animal that reads a dark room with its whiskers, and quietly moved into human houses fifteen thousand years ago.

ages 3+Open it

The Mummy That Waited 3,000 Years

Salt, linen, and seventy days of work. How ancient Egypt made a body last, and why the curse is the only make-believe part.

ages 3+Open it

The Muscles That Can Only Pull

Every step, every heartbeat, every smile is built out of one move: something inside you getting shorter.

ages 3+Open it

The Mushroom Is the Smallest Part

The red-and-white mushroom from every storybook is real, poisonous, and only the tip of something huge under the ground.

ages 3+Open it

The Whale With the Unicorn Tooth

The Arctic whale whose long spiral tusk is really a tooth, and once sold across Europe as a unicorn horn.

ages 3+Open it

The Nurse Who Watches Over You

The kind, sharp-eyed helper who reads your heartbeat, keeps the germs away, and stays by your bed all night.

ages 3+Open it

The Octopus With Three Hearts

Blue blood, eight arms that think for themselves, and a mind that evolved on its own branch of the tree of life.

ages 3+Open it

The Fruit That Named a Color

The orange came first and the color was named after it. Also: every navel orange on Earth is a cutting from one branch in Brazil.

ages 3+Open it

The Whale That Is Really a Dolphin

The orca is the biggest dolphin on Earth, it hunts with sound, and its grandmother knows where the food is.

ages 3+Open it

The Bird That Runs Instead of Flying

The biggest bird on Earth gave up the sky, and got two toes, huge eyes, and a 43 mile per hour sprint instead.

ages 3+Open it

The Otter That Keeps a Rock in Its Pocket

The sea otter has no blubber, the thickest fur on Earth, a favorite rock, and a whole forest depending on it.

ages 3+Open it

The Owl That Flies Without a Sound

The night hunter with eyes that cannot move, crooked ears that map the dark, and wings that make no noise at all.

ages 3+Open it

The Brush That Drinks the Paint

Three parts and one clever trick: how a bundle of hair picks up a liquid, carries it, and lets it go exactly where you want.

ages 3+Open it

The Tree That Bends in the Storm

The palm is not really a tree at all. It has no bark, no branches, and no rings, and it bends flat in a hurricane instead of breaking.

ages 3+Open it

The Bear That Eats Grass All Day

A meat eater's body, a grass eater's diet, and a wrist bone that does the job of a thumb.

ages 3+Open it

The Bird That Talks Back

The bird that holds food like a hand, builds its own colors out of nothing, and learns words on purpose.

ages 3+Open it

The Bird That Wears Two Hundred Eyes

The peacock's fan is not a tail, and there is no blue in it anywhere. Grind up the feather and all you get is brown dust.

ages 3+Open it

The Bird With a Net Under Its Chin

The pelican folds a fishing net into its own face, then falls out of the sky to use it.

ages 3+Open it

The Pencil That Never Held Any Lead

The little wooden stick everyone calls lead, when its gray core is really graphite, the same carbon as a diamond.

ages 3+Open it

The Bird That Flies Underwater

The bird that traded the sky for the ocean, and became the deepest diver with feathers.

ages 3+Open it

The Instrument Named After the Word for Quiet

The piano is named for the one thing a harpsichord could never do: play soft. Inside sit 230 steel strings and a hammer that lets go.

ages 3+Open it

The Pig That Everybody Underestimates

The animal we call dirty and dumb is a clean, clever problem-solver with a nose that reads the ground like a book.

ages 3+Open it

The Person in the Captain's Hat

How a pilot gets a heavy plane into the sky and safely back down, and why there are always two.

ages 3+Open it

The Tree That Keeps Its Leaves All Winter

Why the pine holds its needles through the snow, and why some pine cones stay shut until a fire opens them.

ages 3+Open it

The Fruit Made of Many Fruits

The spiky pineapple looks like one fruit, but it is really dozens of little fruits fused into one.

ages 3+Open it

The Pirate Ship That Voted

Real pirate ships were small, fast, and run by vote. Here is how they actually worked.

ages 3+Open it

The Flatbread That Took Over the World

Pizza started as cheap street food in Naples. Here is how yeast, fire, and a few million travelers turned it into the most eaten meal on the planet.

ages 3+Open it

The Animal Nobody Believed In

The egg-laying, venomous, duck-billed mammal that hunts with its eyes shut. Scientists took scissors to the first one, hunting for the stitches.

ages 3+Open it

The Bear That Isn't White

Clear fur, black skin, and a whole life spent hunting on floating sea ice.

ages 3+Open it

The Car That Comes to Help

The flashing, wailing patrol car is really a small office on wheels, and the first one ran on batteries in 1899.

ages 3+Open it

The Officer Who Knows Your Street

The neighbor with a badge who keeps the peace, and the science that can place anyone at the scene.

ages 3+Open it

The Bug That Can Look Over Its Shoulder

The insect that holds perfectly still, sees in 3D, and hears bats with a single ear on its belly.

ages 3+Open it

The Glass That Lets the Colors Out

A wedge of clear glass, a beam of sunlight, and the experiment that proved white light was never white at all.

ages 3+Open it

The Fish That Puffs Up Like a Ball

The slowest fish in the sea cannot run away, so it swallows the ocean and becomes a spiky balloon.

ages 3+Open it

The Bird That Flies Underwater

The little sea parrot with a beak that falls off every winter, and wings built for the wrong element.

ages 3+Open it

The Wheel That Makes You Strong

A grooved wheel and a piece of rope. It lifts ships, flags and elevators, and it never asks for a battery.

ages 3+Open it

The Fruit That Grows Bigger Than You

A vine on the dirt, a flower that opens for one morning, and a seed box that can outweigh a car.

ages 3+Open it

The Mountain People Built by Hand

Four and a half thousand years ago, workers stacked 2.3 million stones in the desert. It is still standing, and we still cannot say how they raised the blocks.

ages 3+Open it

The Rabbit That Eats Its Dinner Twice

Not a rodent, not fragile, and not sorry. The animal that digests its food twice and once took over a continent.

ages 3+Open it

The Bandit That Sees With Its Hands

Everyone thinks the raccoon is washing its dinner. It is doing something far stranger, and it is doing it with the most sensitive hands in the forest.

ages 3+Open it

The Race Car That Drives Upside Down

The car with wings that push it down instead of up, fast enough to grip a ceiling and drive there.

ages 3+Open it

The Long Life of a Raindrop

How a speck of dust turns into a raindrop, why rain has a smell, and why people have measured it for two thousand years.

ages 3+Open it

The Rainbow You Can Never Reach

Sunlight, a raindrop, and one exact angle. Why the rainbow moves when you move, and why nobody else can see yours.

ages 3+Open it

The Horn That Is Really a Fingernail

The two ton animal that wears a fingernail on its nose, and the ancient family it has left.

ages 3+Open it

The Robot That Never Gets Tired

Where the word robot came from, how a machine senses and moves, and why picking up a sock is harder than chess.

ages 3+Open it

The Rocket That Throws Itself Away

Fire pushes down, the rocket goes up, and most of the machine gets dropped along the way.

ages 3+Open it

The Bird That Knows When Dawn Is Coming

The rooster crows before the sun comes up, and he is not guessing. He is running a clock.

ages 3+Open it

The Rose That Never Had Thorns

Those sharp points are prickles, not thorns. And the rose is a close cousin of the apple.

ages 3+Open it

The Ball That Started as an Accident

Why the rugby ball is shaped like an egg, and how a pig's bladder gave a whole sport its odd, bouncing ball.

ages 3+Open it

The Man Who Gave the Sandwich Its Name

Two slices of bread, one very busy Earl, and the machine that put sliced bread in every American kitchen.

ages 3+Open it

The Machine That Is Always Falling

A satellite does not hover. It falls forever, missing the Earth by exactly the right amount, and that is how it stays up.

ages 3+Open it

The Planet That Would Float

Saturn is lighter than water, wears rings made of billions of ice chunks, and hides a six-sided storm at its pole.

ages 3+Open it

The Scarecrow That Has to Keep Moving

A coat, a hat, and a bundle of straw that only works until the crows figure it out.

ages 3+Open it

The Bus That Had to Be Yellow

Every school bus in America is the same exact shade of yellow, and the reason was decided in one room in 1939.

ages 3+Open it

The People Who Ask Why

What a scientist really is, how the scientific method works, and the true stories of Marie Curie and the photograph that cracked the code of life.

ages 3+Open it

The Little Board on Wheels

The push scooter turns one kick into a long glide, using nothing but your leg and some clever wheels.

ages 3+Open it

The Scorpion That Glows in the Dark

An animal older than trees, nearly blind, that hunts by feeling the ground and shines blue-green under ultraviolet light.

ages 3+Open it

The Turtle That Never Forgets the Way Home

A green sea turtle can cross an ocean, wait thirty years, and still find the exact beach where it hatched.

ages 3+Open it

The Fish Where the Dad Has the Babies

The slowest fish in the ocean has a square tail, no stomach, and a father who gives birth.

ages 3+Open it

The Seal That Sees With Its Whiskers

A seal can chase a fish it never saw, by feeling the trail the fish left behind in the water.

ages 3+Open it

The Seed That Packs Its Own Lunch

Inside every seed is a tiny folded-up plant and a packed lunch to get it to the light.

ages 3+Open it

The Shark That Never Stops Growing Teeth

The fish with no bones, a body wrapped in tiny teeth, and a family older than the first tree.

ages 3+Open it

The Sheep That Never Stops Growing Its Coat

Wild sheep drop their wool every spring. We bred that out, and now the woolliest animal on Earth needs a haircut to stay alive.

ages 3+Open it

The Skeleton That Rebuilds Itself

The 206 bones inside you are alive, and they tear themselves down and build themselves back up your whole life.

ages 3+Open it

The Skunk That Warns You First

The animal that carries only six sprays, so it spends all its effort making sure it never has to use one.

ages 3+Open it

The Sloth That Is Slow on Purpose

The upside-down animal that moves slowly to stay alive, grows a garden in its fur, and climbs down its tree only once a week.

ages 3+Open it

The Snail That Cannot Leave Its House

The slow one that grows its own shell, walks on glue, and eats with fourteen thousand teeth.

ages 3+Open it

The Snake That Smells With Its Tongue

The legless hunter that smells in stereo, swallows meals wider than its own head, and reads body heat in the dark.

ages 3+Open it

The Snowflake That Started as Dust

Every snow crystal grows six arms around a speck of dust, and the big ones have never once repeated.

ages 3+Open it

The Snowman Is Mostly Air

Why snow packs, where snowmen came from, and how one in Maine grew to 122 feet tall.

ages 3+Open it

The Little Trick Hiding in a Bar of Soap

Water cannot wash grease away on its own. Soap is the go-between that makes it happen, and people have been boiling it from fat and ashes for four thousand years.

ages 3+Open it

The Ball Made of Shapes

The black-and-white ball is really a twenty-sided shape in disguise, and its panels quietly steer every kick.

ages 3+Open it

The Panel That Eats Sunlight

A sheet of doped sand with no moving parts that turns light straight into electricity, and now makes the cheapest power in history.

ages 3+Open it

Eight Worlds Around One Star

How a cold cloud of dust became a sun, eight planets, and a whole lot of leftovers.

ages 3+Open it

The House That Never Stops Falling

People have lived above your head every single day since 2000, in a machine that falls forever and always misses.

ages 3+Open it

The Spider That Makes Its Own Rope

Eight legs, a belly full of liquid protein, and a thread that beats steel for its weight.

ages 3+Open it

The Squirrel That Plants a Forest by Forgetting

The nut-burying neighbor that remembers thousands of hiding places, fakes a few, and grows oak trees by accident.

ages 3+Open it

The Star That Made You

Every star is a giant ball of hot gas building new atoms in its core, and almost every atom in your body came out of one.

ages 3+Open it

The Star That Is Not a Fish

No brain, no blood, no bones. It runs on seawater and walks on hundreds of tiny feet.

ages 3+Open it

The Dinosaur With a Roof on Its Back

Seventeen plates, four tail spikes named after a comic strip, and a brain the size of a lime.

ages 3+Open it

The Bug That Pretends to Be a Twig

An insect shaped like a stick, with eggs disguised as seeds and a species that came back from the dead.

ages 3+Open it

The Ray That Cannot See Its Own Dinner

Its eyes are on top and its mouth is underneath, so a stingray finds buried crabs by feeling the electricity in their muscles.

ages 3+Open it

The Bag of Acid That Never Burns You

Your stomach holds acid strong enough to dissolve metal, and rebuilds its own lining every few days to survive it.

ages 3+Open it

The Berry That Is Not a Berry

The red part is not the fruit, the dots are, and the whole thing was invented by accident three hundred years ago.

ages 3+Open it

The Boat That Sinks on Purpose

The boat that floods itself to dive, listens instead of looking, and makes its own air out of the sea.

ages 3+Open it

The Star We Live Next To

Our nearest star: how it makes light, why its sunbeams are older than you think, and how people learned what it is made of without ever touching it.

ages 3+Open it

The Flower That Follows the Sun

It looks like one big flower. It is really a thousand tiny ones, packed at the only angle that never repeats.

ages 3+Open it

The Superhero Who Could Only Listen

A shy girl with no flashy powers, just the ability to hear anyone who needs help, and the choice to show up.

ages 3+Open it

The Gray Baby That Turned Into a Swan

The bird that hatches gray and fuzzy, carries more neck bones than a giraffe, and once proved a whole continent wrong.

ages 3+Open it

The King That Crunched Bones

The tyrant lizard king: a bite that broke through bone, eyes that looked straight ahead, and two small arms nobody has explained yet.

ages 3+Open it

The Devil That Screams in the Dark

The loudest little scavenger in Australia, the strongest bite for its size of any mammal, and a cancer that learned to travel.

ages 3+Open it

The Teacher Who Waits Three Seconds

Why the best teachers ask more than they tell, and how three seconds of silence changes what a kid can say.

ages 3+Open it

The Bear the President Would Not Shoot

A bad hunting trip, a newspaper cartoon, and a German workshop turned into the toy on every kid's bed.

ages 3+Open it

The Hardest Thing in Your Body

Enamel is harder than bone, your body only makes it once, and your teeth are quietly keeping a record of your whole life.

ages 3+Open it

The Tube That Looks Back in Time

A tube of glass that showed the moon has mountains, and that we are not at the center of anything.

ages 3+Open it

The House You Carry on Your Back

A building with no foundation and almost no weight, held up by pushing and pulling against itself.

ages 3+Open it

The Little Tube That Measures Heat

How a thin glass tube turned a feeling into a number, and why it only ever tells you about itself.

ages 3+Open it

The Tiger With Stripes on Its Skin

The biggest cat alive. Its stripes go all the way down to its skin, and no two tigers wear the same pattern.

ages 3+Open it

The Fruit That Everyone Calls a Vegetable

The round red berry that was feared as poison for two hundred years, then fed the world.

ages 3+Open it

The Only Part of You That Cannot Heal Itself

Enamel is the hardest thing your body makes, it can never grow back, and it quietly keeps a record of the day you were born.

ages 3+Open it

The Brush That Fights an Invisible City

Two minutes of soft bristles tears apart a living city of bacteria, and it took people five thousand years to get the design right.

ages 3+Open it

The Storm That Touches the Ground

The spinning column of air that hangs out of a thundercloud, and why it only counts once it reaches the grass.

ages 3+Open it

The Tortoise That Wears Its Bones on the Outside

The slow land reptile whose shell is really its own ribs and backbone, and who can outlive six human generations.

ages 3+Open it

The Toucan and Its Impossible Bill

The bird that carries a bill a third of its own length, and how scientists finally worked out what it is for.

ages 3+Open it

The Tractor That Was Built to Be Slow

The machine that trades speed for pulling force, and the one clever hitch that stopped it flipping over backward.

ages 3+Open it

The Train That Steers Itself

No steering wheel, no driver turning the wheels, and a clever cone shape that walks a train around every curve.

ages 3+Open it

The Chest With the Secret Keyhole

Pirates almost never buried gold. The real treasure chests had a fake keyhole on the front and a hidden one in the lid.

ages 3+Open it

The Tree That Drinks With Its Feet

Roots that drink, a trunk that lifts water higher than a building with no pump, and leaves that build wood out of thin air.

ages 3+Open it

The Tree That Eats Air

A tree builds its whole body out of air, water, and sunlight, and keeps a diary of every year it lived inside its own wood.

ages 3+Open it

Three Horns and a Shield of Bone

The three horned giant that carried a solid slab of bone on its head, and was still standing on the last day of the dinosaurs.

ages 3+Open it

The Cup That Started as a Pile of Armor

The shiny gold winner's cup began as a stack of captured enemy armor, and slowly became a prize for trying your best.

ages 3+Open it

The Truck That Brings You Everything

Why a big rig is really two machines, how it stops with air, and the trucker whose idea rearranged the world.

ages 3+Open it

The Trumpet Is Just a Long Pipe

A buzz from your lips, five feet of bent brass, and three little valves that change everything.

ages 3+Open it

The Little Guitar That Sailed to Hawaii

The four-stringed jumping flea that sailed from Portugal to Hawaii and charmed the whole world.

ages 3+Open it

The Little Roof You Carry

A folding machine four thousand years old, invented for shade and borrowed for rain.

ages 3+Open it

The Unicorn Nobody Ever Caught

The horse with one horn that people believed in for two thousand years, and the real animals hiding behind the legend.

ages 3+Open it

Nobody Grows a Vegetable

Every vegetable is a different body part of a plant, and the word itself is something people made up in the kitchen.

ages 3+Open it

The Doctor Who Cannot Ask What Hurts

The animal doctor who treats hundreds of species, reads clues instead of words, and quietly guards human health too.

ages 3+Open it

The Wooden Box That Sings

Seventy pieces of wood, a stick strung with horsehair, and a sound that carries to the back of the hall.

ages 3+Open it

The Walrus That Walks on Its Teeth

The tooth walker of the Arctic: it hooks itself onto ice with its tusks, finds clams by touch in the dark, and blushes pink when it gets warm.

ages 3+Open it

The Water That Keeps Coming Back

No water on Earth is new. The rain in your yard has been an ocean, a cloud, and a dinosaur's drink, and it is still going around.

ages 3+Open it

The Waterfall That Walks Backward

Falling water eats the rock underneath it, so every waterfall slowly climbs upstream. Niagara has walked seven miles.

ages 3+Open it

The Watermelon That Came From the Desert

A dry-country vine that builds its own water tank, and how a pale, bitter gourd became the sweetest thing on the picnic table.

ages 3+Open it

The Biggest Animal That Ever Lived

The blue whale is larger than any dinosaur, breathes air like you do, and its family once walked on land.

ages 3+Open it

The Machine That Catches the Wind

Three blades that work like airplane wings, tips moving faster than a race car, turning moving air into the electricity in your lamp.

ages 3+Open it

The Windmill That Turns Wind Into Bread

A building with no engine and no fuel. It catches the wind, grinds grain into flour, and has been doing it for a thousand years.

ages 3+Open it

The Wizard Who Wasn't Magic

Six wizard stories, from a starry hat and a lost pair of glasses to the old idea hiding under the pointed hat: that a wizard was once just a person wise enough to pay attention.

ages 3+Open it

The Wolf Pack Is Just a Family

The howl, the pups, and the alpha wolf that never existed. A wolf pack turns out to be a mom, a dad, and their kids.

ages 3+Open it

The Wombat That Poops in Cubes

The burrowing Australian marsupial with a backward pouch, an armored backside, and the only cube-shaped droppings in nature.

ages 3+Open it

The Bird That Hammers All Day

The bird that drills into trees twenty times a second, catches grubs with a tongue that wraps around its own skull, and builds homes for half the forest.

ages 3+Open it

The Worm That Built the Ground

The eyeless, boneless animal that eats dirt, breathes through its skin, and quietly builds the soil every plant on land grows in.

ages 3+Open it

The Xylophone: Wood That Sings

A row of wooden bars you strike with mallets, where long bars sing low and short bars sing high, and the name simply means wood sound.

ages 3+Open it

The Zebra Nobody Could Tame

Every zebra wears a stripe pattern no other zebra has, and in ten thousand years nobody has managed to tame one.

ages 3+Open it