Don’t just read it. Move it.
Ask about any concept. Get a focused, interactive lesson — a scene that moves, controls that change it, and the explanation underneath.
What do you want to understand?
Or start with one of these
One swing takes
2.20 sec
Gravity changes the rhythm.
Same pendulum. Different world.
Compound interest, made visible.
Drag the controls. The chart and every number update immediately using our tested calculator—not a number improvised by the model.
Open the full lessonBalance
Years from today
This chart as text
- You put in: £5,000 at the start, £35,000 halfway, £65,000 at year 25.
- Growth: £0 at the start, £24,717 halfway, £125,641 at year 25.
- Bands are stacked, so the top of the stack is the total.
Balance after 25 years is £190,641. You put in is £65,000, Starting amount plus every monthly deposit. Growth is £125,641, 66% of the final balance.
Every idea gets the shape that fits it.
These are finished examples. Your prompt creates a new explainer rather than replaying one of them.
One turn of the Earth is one day
Turn the globe, move the marked place, and watch the day/night line.
Seasons come from the lean, not from the distance
Take the tilt to zero and watch the seasons disappear at an unchanged distance.
What pitch actually is
Raise the pitch and count the humps crowding into the same stretch of air.
How DNS turns a name into an address
Follow a request from your browser to the authoritative server.
How projectile motion works
Change the angle, speed and gravity, then watch the trajectory respond.
Why 23 people is enough to share a birthday
Run a seeded simulation against the exact probability curve.
How a bond's price reacts to interest rates
See how a bond price reacts as interest rates move.
How damping kills an oscillation
Compare three curves and see how damping removes energy.
How binary search finds anything in 4 guesses
Step through a changing search range, one decision at a time.
The model teaches. The engine keeps it honest.
- 01
Choose
AI turns your question into a suitable lesson shape.
- 02
Build
Our interface renders the diagram, controls and steps.
- 03
Check
Trusted calculators own the maths wherever one fits.