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Big Ideas, Made Playful
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Math, science, physics, the Earth and the sky — pick any one to explore
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First, this
Why do we learn maths?
An honest answer to a fair question. Calf raises for your brain — and the language the universe seems to speak. Read this before the rest.
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Lesson 1 · Math
Hilbert's Hotel
A hotel with infinite rooms is full. Can it still fit one more guest? An infinite bus full?
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Lesson 2 · Math
Fibonacci & Nature
A secret pattern of numbers hides inside flowers, pinecones, seashells — even galaxies.
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Lesson 3 · Math
Pythagoras' Magic
A 2,500-year-old rule about triangles. Two little squares always fit inside the big one.
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Lesson 4 · Math
Binary: How Computers Count
Eight light bulbs, on or off. That's the entire secret of how every computer works.
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Lesson 5 · Math
Balance Puzzles
Six puzzles with apples, oranges and a scale. Plot twist — you're doing real algebra.
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Lesson 6 · Math
The Atoms of Math
Watch the Sieve of Eratosthenes catch all the primes. Every other number is built from them.
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Lesson 7 · Science
Gravity & Forces
An invisible force holds you to Earth, keeps the Moon in the sky, and makes everything fall. Drop a feather and a ball to find out who wins.
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Lesson 8 · Science
The Water Cycle
The same water has been on Earth for 3 billion years — from ocean to cloud to rain and back again, endlessly.
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Lesson 9 · Science
Light & Colours
White light hides every colour of the rainbow. Mix red, green, and blue light to make any colour your screen can show.
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Lesson 10 · Math
Fractions
Half a pizza. A quarter of an hour. Cut the pizza, do the quiz, and see how fractions compare in the fraction wall.
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Lesson 11 · Math
Roman Numerals
I, V, X, L, C, D, M — seven letters that wrote every number for a thousand years. Convert any number with the live converter.
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Lesson 12 · Math
Symmetry
Fold things in half — butterflies, snowflakes, faces. Draw on the symmetry canvas and watch the other side mirror you.
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Lesson 13 · Science
The Solar System
One Sun, eight planets. Tap each one to read three facts. Earth is the only blue one — and the only one with us.
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Lesson 14 · Science
The Human Body
Brain, heart, lungs, bones. 37 trillion cells, 100,000 heartbeats a day, and a sleep schedule that's actually a build cycle.
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Lesson 15 · Math
Numbers Around the World
Egyptian, Chinese, Mayan, Roman — five different ways people have written numbers. Why did 0–9 win, and who invented the zero?
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Lesson 16 · Math · Skill
Times Tables
Skip-count any number, see the whole grid, then beat the clock. The drill keeps your best time so you can chase it.
Practise →
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Lesson 17 · Physics
Forces & Motion
Push, pull, friction. Why a moving thing keeps moving — and why it eventually stops. Newton's first big idea.
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Lesson 18 · Physics
Magnets
North pole, south pole. Opposites attract, sames repel. Try the demo and guess what sticks to a magnet.
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Lesson 19 · Physics
Electricity
Tiny electrons running through wires. Build a circuit, flip a switch, light a bulb. Find out why lightning happens.
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Lesson 20 · Physics
Sound
Things wobble, the air wobbles, your ears wobble. Slide the pitch and watch the wave. Plus — why space is silent.
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Lesson 21 · Physics
Simple Machines
Lever, pulley, ramp, wheel, wedge, screw. Six clever shapes that built every pyramid and every road.
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Lesson 22 · Physics
States of Matter
Solid, liquid, gas — same atoms, different ways of holding hands. Slide the temperature and watch water change.
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Lesson 23 · Physics
Energy
Eight forms, one rule: energy never disappears. Watch the swing trade stored energy for movement and back.
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Lesson 24 · Physics
Floating & Sinking
Why a heavy ship floats and a tiny pebble sinks. Drop different things in the tank — predict, then watch.
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Lesson 25 · Chemistry
Atoms & Elements
Everything is built from just 118 kinds of tiny pieces. Zoom into an apple. Meet hydrogen, iron, gold — and find out what YOU are made of.
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Lesson 26 · Chemistry
Molecules & Reactions
Atoms hold hands → molecules. Atoms swap partners → reactions. Watch a nail rust, then find out why your blood is red. (Same reason!)
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