Each stage is a colour: shorter wavelength, more energetic light, deeper physics.

Find your level

Choose the stage that sounds like you, or let a short placement quiz suggest one.

Take the placement quiz

About 10 questions that get harder as you go. Stop whenever it feels too hard: that's where you'll start.

🔦1/5

Ages 7–10 · first steps

Pushes and pulls, falling, floating, light and shadows, sound and magnets.

📏2/5

Ages 10–13

Measure the world: scale and units, speed, matter and heat, energy, levers and circuits.

⚙️3/5

Ages 13–16

Newton's laws, momentum, projectiles, work and energy, gravity and orbits.

🌊4/5

Ages 16–18

Oscillations and waves, light and optics, electric fields, induction, heat and entropy.

🌌5/5

Ages 18+ · university

Relativity, quantum physics, least action, chaos, nuclei, particles and the expanding universe.