Learn how machines and the universe work by playing with them.
Drag the gears, launch the rocket, tilt the Earth. Every simulation runs on real equations, so what you see is what the physics says.
👉 Psst… the space scene is a toy. Tap it, drag it, poke it!
Learn it by doing it
- 01
Play
Drag, slide and launch. Every control changes the experiment instantly.
- 02
See the physics
Live numbers and graphs show exactly what the equations say is happening.
- 03
Check yourself
Challenges and a quick quiz turn what you noticed into what you know.
Astronomy
The Moon, the seasons, orbits and gravity. Move the sky around and watch what happens.
Phases of the Moon
Move the Moon around Earth to see why its shape changes, and line them up for an eclipse.
Day, Night and Seasons
Spin and tilt the Earth, follow its orbit, and watch daylight and sunlight angle change.
Orbits and Escape Velocity
Launch a satellite and find the speed that orbits, escapes or crashes.
Solar System to Scale
Scroll from the Sun to Neptune at true distance and feel how empty space is.
Rocket Staging
Set fuel and stages, launch, and watch thrust fight gravity.
Night Sky and the Pole Star
Watch the real night sky turn over an Indian city, and use Saptarishi to find the Pole Star.
Your Weight on Other Worlds
Step on a scale and jump on the Moon, Mars, Jupiter and even the Sun: your mass stays, your weight changes.
Tides
Move the Moon around Earth to see the oceans bulge, and find spring and neap tides.
Earth to the Edge of the Universe
Zoom out from Earth past the Sun, the nearest star and the Milky Way to the edge of the observable universe.
Mechanics
Forces, machines and motion. Push, pull, spin and swing things to see how they work.
Projectile Motion
Launch at any angle and speed, then find the angle that throws the farthest.
Forces and Friction
Push, pull and change the surface to see which forces win and why things stop.
Levers and Pulleys
Slide the fulcrum and add pulleys to lift a heavy load with less effort.
Pendulum and Spring
Change length, mass and stiffness and see what really sets the time period.
Rolling and Torque
Race a ring, a disc and a ball down a slope and discover moment of inertia.
Gear Train Lab
Change tooth counts and watch speed, torque and direction trade off.
Hydraulic Lift
Press a small piston and lift a car with Pascal's law.
Four-Stroke Engine
Step through intake, compression, power and exhaust inside a running cylinder.
Car Differential
Drive round a corner and see why the wheels must spin at different speeds.
Electricity
Cells, bulbs, switches and magnets. Build circuits and watch the current flow.
Electric Circuits and Ohm's Law
Build a circuit with cells, bulbs and a switch, and see why bulbs in series and parallel glow differently.
Electromagnets
Wind a coil, switch on the current and see how many paper clips your magnet can lift.
Light
Mirrors, lenses and prisms. Bend and bounce light rays and see where images form.
Mirrors and Ray Diagrams
Move an object in front of plane, concave and convex mirrors and watch the rays find the image.
Lenses and the Lens Formula
Slide an object past convex and concave lenses and see real and virtual images form.
Refraction and Prisms
Bend a light beam through water, glass and diamond, trap it by total internal reflection, and make a rainbow.
Sound
Vibrations and waves. Change pitch and loudness and see what sound looks like.
Ready to tinker?
No account, no download. Open a simulation and start playing.
Open Phases of the Moon