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Science Classes for Kids

317 free science classes for kids (Ages 6–12) on Wunder — short, fact-checked courses and lessons with narration and a quiz. Filter by age — each link is its own page, not a JavaScript toggle.

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How to make pizza dough

Mix flour, lukewarm water, salt, and yeast, knead until it is smooth, and wait until it is puffy. A first dough tonight, with the science that makes it stretch.

How to make tiramisu

Cook the yolks to 160°F, keep the mascarpone cold, and roll hard ladyfingers for two seconds. A first pan tonight, with the science that makes it stand.

How to make french toast

Dry the bread, mix three eggs to a cup of milk, and soak until a slim dry spine remains. A first plate tonight, with the science that keeps the center custard.

How to make mashed potatoes

Rinse the starch, rice the russets, fold the butter before the milk. A first pot tonight, with the science that keeps it fluffy.

Why the Ocean Stays Layered

The ocean looks flat, but density builds layers beneath the surface. Learn why they persist, and what finally mixes them.

How to make hummus

Simmer the canned chickpeas with baking soda, steep the garlic in lemon, and add tahini last. A first bowl tonight, with the science that makes it silk.

How to make focaccia

Fold a wet dough four times, dimple it to the pan, and bake until the high spots bronze. A first slab tonight, with the science that makes the bubbles.

How to make scrambled eggs

Salt the eggs in the bowl, keep the pan polite, and pull them while they still shine. A first plate tonight, with the science that keeps them creamy.

How to make roast chicken

Salt the bird, flatten it, roast hot. A first roast tonight, with the science that keeps breast meat juicy.

Why Polar Seasons Are So Extreme

Discover why the poles have a summer where the Sun never sets and a winter of darkness, all because of the way our planet leans.

Where Are the Poles?

Find the very top and very bottom of our round Earth, the coldest and iciest places of all.

The Race to the South Pole

In 1911 two brave teams raced to be first to the South Pole. Follow Amundsen and Scott across the ice and see how their choices decided the outcome.

The Midnight Sun and Polar Night

Find out why the Sun can shine all night long in summer and hide for weeks in winter at the very top and bottom of the world.

The Inuit and Sami Peoples

Meet two Indigenous peoples of the Arctic, the Inuit and the Sami, and discover how they live in one of the coldest places on Earth.

The Antarctic Treaty and Research

Antarctica belongs to no one and everyone. Learn how the 1959 treaty keeps it peaceful and what scientists discover at the bottom of the world.

Protecting the Polar Regions

The poles are worth saving, and the good news is we can help. Discover how people protect them, and the everyday actions that make a difference.

Polar Food Chains

Follow the food chains of the Arctic and Antarctic, from tiny phytoplankton and krill all the way to whales and polar bears.

Meet the great white bear of the frozen north and learn how it stays warm, swims, and raises cuddly cubs.

Ice and States of Matter

Follow water as it turns from solid ice to liquid water to a gas, all by getting warmer or cooler.

Discover how water turns into sparkly ice and soft, six-sided snowflakes in the coldest, most wonderful places on Earth.

How Polar Animals Beat the Cold

Discover the clever ways polar animals stay toasty warm in the coldest places on Earth.

Glaciers and Ice Sheets

Glaciers are rivers of ice that carve whole valleys. Discover how they form, how they reshape the land, and how giant ice sheets make icebergs.

Earth's Frozen Water

From glaciers to sea ice to snow, explore the cryosphere, all of Earth's frozen water, and discover why it matters for the whole planet.

Comparing the Arctic and Antarctic

Explore the two frozen ends of our planet and discover why the icy north and the icy south are surprisingly different worlds.

Comparing Polar Ecosystems

The Arctic and Antarctic look alike but are opposites, an ocean ringed by land and a continent ringed by ocean. Compare their worlds and wildlife.

Climate Change at the Poles

Why are the poles warming faster than anywhere else, what is it changing, and what can we do? A hopeful look at the science and the solutions.

Brave Polar Explorers

Bundle up and meet the brave explorers who traveled to the coldest, iciest ends of the Earth.

Arctic vs Antarctic

Meet the two coldest, iciest places on Earth and learn why polar bears and penguins never say hello.

The Body's Organ Systems

Meet the six teams of organs inside you and discover how each one keeps your body moving, breathing, fueled, and in control.

How Plants Build Themselves from Air and Water

Uncover the surprising truth that a plant builds most of its body not from soil, but from an invisible gas in the air.

Energy from the Sun to Food

Follow energy on its amazing journey from the Sun, into green plants, and along a food chain to the animals that eat them.

Diet, Exercise, and Your Body

Discover how the right foods fuel you and how moving your body keeps your heart, muscles, and bones strong.

Body Structures for Survival

Discover how bones, muscles, teeth, senses, and organs team up to keep your body alive and thriving.

Why Offspring Look Like Their Parents

Discover why baby animals and plants resemble their parents, and why every living thing is still a little bit different.

What Living Things Need

Every living thing needs food, water, air, shelter, and space. Discover what keeps people, animals, and plants alive.

Variation and Survival

Why no two living things are exactly alike, and how those tiny differences can decide which animals survive, thrive, and pass their traits on.

Why you have different-shaped teeth for cutting, tearing, and grinding — and how an animal's teeth reveal whether it eats plants, meat, or both.

The Human Life Cycle

The journey every person takes, from a tiny baby to a growing child, a changing teenager, a grown-up adult, and a wise elder.

The Digestive System

Follow a bite of food on its amazing journey from your mouth to your stomach and through your intestines, where your body grabs the goodness it needs.

Skeletons and Muscles

The bones that hold you up and shield your insides, the joints that let you bend, and the muscles that pull in pairs to move you.

Senses, Brain, and Responses

How your five senses gather clues about the world, send them racing along nerves to your brain, and how your brain decides what to do next.

Pollination and Seed Dispersal

How flowers swap pollen to make seeds, and the clever ways seeds travel by wind, water, animals, and even tiny explosions.

Naming Plants and Animals

Learn the names of the plants and animals all around you, from pets and farm animals to flowers and trees.

Life Cycles of Living Things

How living things are born, grow up, make young of their own, and start the whole cycle again — from frogs and butterflies to plants and people.

Inherited and Environmental Traits

Which parts of you were passed down from your parents, which ones you picked up from the world around you, and why many traits are a mix of both.

Peek inside a seed and follow it as it sprouts, grows a root and shoot, and becomes a whole new plant.

How Plant Parts Work

Explore how a plant's roots, stem, leaves, and flowers each do their own job to keep the whole plant alive.

Herbivores, Carnivores, and Omnivores

Discover which animals eat plants, which eat meat, and which eat both, and learn to sort them by what they eat.

Drawing Life Cycle Diagrams

Learn to read and draw life cycle diagrams, using arrows and circles to show how living things grow and repeat.

Body Parts, Plants, and Animals

Meet the wonderful bodies of people, plants, and animals, and discover what makes something a living thing.

Animal Nutrition and Classification

Explore how animals get their food through food chains, and how scientists classify animals into groups.

Animal Life Stages

Watch animals grow from tiny babies to grown-ups, and follow the amazing life cycles of butterflies and frogs.

Animal Adaptations and Nutrient Transport

The clever body parts and behaviours that help animals survive anywhere, plus how blood and plant tubes deliver food and water to every living part.

Whales and Dolphins Are Mammals

They live in the sea and look a bit like fish, but whales and dolphins are mammals like us. Find out how they breathe air and feed their babies milk.

Tides, Waves, and Currents

Why does the sea rise and fall, where do waves come from, and how does water travel across whole oceans? Meet the three great motions of the sea.

The Ocean's Depth Zones

Take a dive from the sunny surface down into total darkness, and discover the sunlight, twilight, and midnight zones and the creatures that live in each.

The Ocean Floor

Beneath the waves lies a hidden landscape of flat plains, towering mountain ranges, and trenches deeper than any mountain is tall. Explore the bottom of the sea.

The Ocean and Climate

Discover how the giant ocean soaks up heat, makes clouds and rain, and helps steer the whole planet's weather.

Peek into the little pools left behind when the sea goes out, and meet the starfish, crabs, and colourful creatures that live in them.

Ocean Food Webs

One ocean animal usually eats many foods, and is eaten by many others. See how dozens of food chains link together into a tangled ocean food web.

Ocean Food Chains

Follow the sun's energy from tiny sea plants all the way up to the hungry shark, and see how every ocean animal is a link in the chain.

Ocean Ecosystems

Explore coral reefs, kelp forests, and the open sea to see how ocean living things depend on one another.

Ocean Currents and Global Heat

Follow the global conveyor belt, a worldwide loop of currents that moves heat around the entire planet.

Ocean Animals and Their Adaptations

From streamlined sharks to glowing anglerfish, discover the clever body features and tricks that help ocean animals swim, breathe, hide, and hunt in the sea.

Ocean Animal Migrations

Follow whales, turtles, and salmon on some of the longest journeys any animal makes across the open sea.

How We Protect the Ocean

Meet the marine reserves, clever rules, and everyday heroes helping the ocean stay wild and full of life.

How We Explore the Ocean

Climb aboard submersibles, listen with sonar, and pilot robots to explore the deepest, darkest parts of our planet.

How Humans Harm the Ocean

See how plastic and overfishing hurt the sea, and the hopeful steps people are taking to fix them.

Deep-Sea Creatures

In the cold, crushing, pitch-black deep sea live some of the strangest animals on Earth. Meet glowing anglerfish, giant squid, and creatures that thrive with no sunlight at all.

All About Oceans

The ocean is the biggest, bluest place on Earth. Dive in to learn why it is salty, where the waves come from, and who lives in the big blue.

Separating Mixtures

Muddy water, salty water, iron in sand — every mixture can be split apart. Master filtering, sieving, evaporating, and magnets.

Reversible and Irreversible Changes

Some changes can be undone and some make brand-new materials forever. Learn to tell melting and dissolving from burning, rusting, and cooking.

Matter Is Made of Particles

Everything around you is built from particles too tiny to see. Find out how they pack and move, and why smells drift across a room.

Dissolving and Solutions

Watch sugar vanish into water and discover the science of solutes, solvents, and solutions — plus why some things simply won't dissolve.

Conservation of Mass

Melt it, dissolve it, mix it — the amount of stuff never changes. Discover why mass is always conserved, even when things seem to vanish.

Comparing Material Properties

Why are windows glass and tyres rubber? Test materials for hardness, flexibility, transparency, and more to pick the right one for every job.

Coasts and Beaches

Let's take a happy trip to the seaside to feel the sand, watch the waves, and find shells and crabs!

Animals of the Ocean

Dive into the big blue ocean to meet friendly fish, playful dolphins, gentle turtles, and a wiggly octopus!

Why There Are So Many Insects

Insects outnumber every other animal on Earth. Discover the clever tricks, tiny bodies, and big families that make them so successful.

Testing Materials for the Job

Which material makes the best umbrella, coat, or bag? Run tests to compare materials and use your results to pick the perfect one for each job.

Testing and Classifying Materials

Be a material scientist! Run simple, fair tests to find out what materials are really like, then group them by what you discover.

Taking Things Apart and Rebuilding

Many things are built from parts you can take apart and use again. Explore how objects come apart, get sorted, and are rebuilt into something new.

Sorting Materials into Groups

Let's put things into groups! Sort by hard or soft, shiny or dull, and floaty or sinky, and become a sorting star.

Solids, Liquids, and Gases

Everything around you is a solid, a liquid, or a gas. Meet all three and learn the fun ways to tell them apart!

Protecting Insects

Insects like bees are in trouble, but there is lots we can do to help. Learn why they matter and how to be a friend to insects.

Objects and the Materials They're Made Of

A window is glass and a spoon is metal, but why? Discover how the right material is chosen for every everyday object.

Insects in Ecosystems

Tiny insects do enormous jobs, pollinating flowers, feeding other animals, and recycling waste. See how they hold nature together.

Insect Anatomy Up Close

Zoom in on the amazing bodies of insects, from their three body parts to their compound eyes, six legs, and wings.

How Insects Communicate

Insects send messages with scent, sound, dance, and even flashes of light. Discover the secret languages of the insect world.

Heating, Cooling, and Changing State

Heat it up or cool it down and matter can change! Discover melting, freezing, boiling, and condensing, and see how water does all four.

Grouping Solids, Liquids, and Gases

Become a state-of-matter detective! Learn the clear rules for grouping anything as a solid, liquid, or gas, even the tricky ones like sand and jelly.

Everyday Materials

Wood, metal, plastic, glass, and fabric are all around us. Meet the everyday materials our world is made from.

Evaporation and the Water Cycle

Where does a puddle go when it dries? Follow water as it evaporates, forms clouds, and falls again on its never-ending journey around our planet.

Drawing Particle Diagrams

Everything is made of tiny particles! Learn to draw and read the diagrams that show how particles are arranged in solids, liquids, and gases.

Describing Materials

Is it hard or soft? Shiny or dull? Rough or smooth? Learn fun words to describe the things all around you.

Complete and Incomplete Metamorphosis

Some insects change completely as they grow, and some change bit by bit. Compare the two ways insects grow up, from caterpillars to nymphs.

Choosing the Right Material

Why are windows made of glass and boots made of rubber? Learn how the way a material behaves helps us pick the perfect one for every job.

Changing the Shape of Solids

Bend, squash, twist, and stretch! Discover the four fun ways you can change the shape of some solid materials.

Where Minibeasts Live

Minibeasts have homes all around us! Peek under logs, dig in the soil, and look on leaves to find where tiny creatures live.

The Insect Body

An insect is three chunks, not one lump: head, thorax, and abdomen, plus six legs and a shell it has to moult.

Sorting Minibeasts with a Key

Learn to name any minibeast by following a dichotomous key, then build your own key of yes-or-no questions.

Record-Breaking Insects

Meet the champions of the insect world: the heaviest, strongest, fastest, longest, and loudest bugs of all.

Minibeasts in the Food Chain

Follow the food from a sunny leaf to a hungry bird and meet the tiny minibeasts in between.

Insects vs Other Minibeasts

Learn the six-leg rule that tells a true insect apart from spiders, woodlice, worms, and snails.

Insect Adaptations

Discover the specialised tools, from nectar straws to grabbing legs to air bubbles, that help insects survive anywhere.

How Minibeasts Move

Some crawl, some fly, some jump, and some slide! Discover all the different ways tiny minibeasts get around.

How a Caterpillar Becomes a Butterfly

Follow the amazing story of a tiny egg that grows into a hungry caterpillar and changes into a beautiful butterfly.

Going on a Bug Hunt

Pack your magnifier and hunt for minibeasts under logs, on flowers, and by the pond, kindly and carefully.

Complete Metamorphosis

Watch a caterpillar rebuild itself into a butterfly through the four amazing stages of complete metamorphosis.

Common Minibeasts

Meet the friendly little creatures you can find in any garden, from spotty ladybirds to slow snails and busy bees.

Caring for Minibeasts

Little bugs need our kindness too. Learn how to be gentle with minibeasts and make a cosy home for them in the garden.

Camouflage, Warning Colors, and Mimicry

Discover three clever ways insects stay safe: vanishing, shouting danger with color, and faking a sting.

Bees, Ants, and Their Colonies

Go inside the buzzing hive and the underground ant city to see how social insects work as one team.

Resultant Forces

Real objects feel many forces at once. Learn to add them up into a single resultant force — and predict exactly how an object will move.

Relative Motion

Are you sitting still right now — or hurtling through space? Both can be true. Discover how motion depends entirely on who is watching.

Pushes and Pulls

A gentle first look at forces for little scientists: a push moves things away, a pull brings them close — and both are forces that make things move.

Predicting How Things Move

Every wobble, roll, and zoom starts with a push or a pull. Learn what forces do to moving things — and start predicting what happens next.

Give forces their names: pushes, pulls, gravity, friction and magnetism — and learn to spot which force is at work in the world around you.

Mass and Weight

They sound like the same thing — but they're not. Learn why mass stays fixed while weight changes, and how the formula W = m × g links them.

Magnetic Fields

Magnets can pull and push without ever touching. Explore poles, the invisible magnetic field around every magnet, and why Earth itself is one giant magnet.

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