2DAge 8+15 min
Pendulum: what sets the period
Two pendulums of different length swing side by side: the short one makes more swings. An oscillation and period experiment for kids 8+.
Projects gallery
Physics experiments
Interactive experiments for kids, students and teachers. Run each one right on the page, then open a copy in the Tymora editor and change mass, friction, elasticity or gravity. Every experiment comes with discussion questions and a version to try at home.
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Motion & forces
Collisions & energy
Balance
Oscillations & waves
Machines
Matter, current & light
Logic & chance
2DAge 8+10 min
Newton’s cradle: conservation of momentum
One ball strikes a row and exactly one ball swings out from the other end. An interactive Newton’s cradle — a lesson on momentum and energy.
2DAge 8+15 min
Seesaw lever: the balance rule
A heavy load close to the pivot balances a light one far away. An interactive lever model for kids 8+: torque and balance.
3DAge 8+15 min
A car with drive and steering: how wheels work
A drivable 3D car: keys W, S, A, D. Find out where the force that moves it comes from. Physics for kids 8+.
3DAge 9+15 min
Propeller airplane: thrust and lift
Speed a 3D airplane up and take off: the propeller gives thrust, the wing gives lift. Flight physics for kids 9+.
3DAge 8+10 min
Gears: the gear ratio
Gears with 12 and 24 teeth: the small one spins twice as fast, reversed. A gears experiment for kids 8+.
3DAge 8+10 min
Belt and chain: transmitting rotation
Belt and chain like on a bike: rotation keeps its direction, speed depends on wheel size. For kids 8+.
3DAge 9+15 min
Workshop: piston, spring and chain
A piston on key P, a weight on a spring and a ball on a chain in one 3D scene. Mechanics for kids 9+.
2DAge 9+10 min
Galton board: a bell curve from chance
Balls fall through rows of pegs and pile up in a bell shape. Hands-on probability and the normal distribution for kids 9+.
2DAge 8+10 min
Billiards: collisions and momentum
A cue ball breaks a rack on a top-down table. Momentum passes from ball to ball — a collision experiment for kids 8+.
2DAge 9+15 min
Lever catapult: launch by a falling weight
A heavy weight drops onto the short arm of a lever and throws a light ball from the long one. A levers and energy experiment for kids 9+.
2DAge 8+10 min
Leaning stack: where is the center of mass
Two stacks of books: one with a careful overhang and one with too much. One stands, the other falls — the center of mass decides.
3DAge 9+10 min
Carousel: when the ball flies off
A disk spins up with three balls at different distances from the center. Which flies off first? A rotation and friction experiment for kids 9+.
3DAge 9+10 min
Pendulum wave: patterns from oscillations
Eight pendulums of different lengths swing together: first a travelling wave, then chaos, then order again. A 3D experiment for kids 9+.
2DAge 9+15 min
Series and parallel circuits
Two bulbs one after another and two bulbs side by side: compare brightness, current and voltage. Click the switch — the circuit is live.
2DAge 8+10 min
A sensor opens the door: “if — then” logic
A ball rolls down a ramp and bumps a sensor, which turns green and removes the support under a second ball. Built from blocks.
3DAge 9+10 min
A button starts the motor: a robot with rules
A ball drops onto a button — it turns green and the carousel motor starts. Space pushes the ball again.
2DAge 8+10 min
A ladder against a wall: which angle is safe
Two ladders lean on a wall: the steep one stands, the shallow one slides. Find out why ladders are set at about 15°.
2DAge 8+10 min
A tilted tray: when does the salt shaker slide
Identical salt shakers stand on trays tilted 10°, 20° and 35°. Find the angle where static friction no longer holds.
2DAge 9+15 min
Basketball: make the shot
A ball flies along a parabola toward the hoop. Tune the speed and angle; the sensor under the basket turns green on a score.
2DAge 8+10 min
Skate halfpipe: energy back and forth
A wheel rolls into a half-round ramp and climbs the other side almost to the same height. A chart shows the energy.
2DAge 8+10 min
Crash test: why wear a seat belt
Two carts with dummies hit a barrier. The belted one stays put, the unbelted one flies forward.
2DAge 9+15 min
Ship stability: cargo on deck and in the hold
Two identical boats are heeled over. Cargo high on a mast capsizes one, cargo in the hold rights the other.
2DAge 9+15 min
A stone arch without mortar
Nine wedge stones hold each other and a load on top. Remove the keystone and the arch collapses.
2DAge 8+10 min
An iceberg: how much is underwater
Ice, wood and foam in sea water. Only the tip of an iceberg shows above water — about one ninth.
2DAge 9+10 min
Batteries in series: brighter or burnt
One, two and three 4.5 V batteries power identical 6 V bulbs. One glows dim, two bright, three burns the bulb.
2DAge 8+10 min
Home wiring: each lamp has its own switch
Three lamps are wired in parallel, each with its own switch. Click them — the other lamps keep glowing as before.
2DAge 8+10 min
A tower crane and its counterweight
Two cranes hold the same load. One has a counterweight and its jib stays level; the other’s jib tips over.
2DAge 8+15 min
A Rube Goldberg machine: a chain of events
A ball rolls down a ramp, topples dominoes, the last one hits a lever, which tosses a ball — and the ‘bell’ rings.
2DAge 8+10 min
Spring scale: a spring measures weight
Weights of 0.5, 1 and 2 kg and one unknown hang on identical springs. A spring stretches in proportion to the load, so the ruler reveals the mass.
2DAge 9+10 min
The arm as a lever: the biceps beats the load
A forearm holds 1 kg and 3 kg in the hand. The muscle attaches close to the elbow, so it pulls several times harder than the load weighs.
2DAge 8+15 min
Robot vacuum: rules and touch sensors
A top view: the robot bounces off furniture and picks up crumbs. A touch sensor removes each crumb and timer rules change its course.
2DAge 9+10 min
The shock absorber: keeping the body from bouncing
Two identical cars drive over bumps: the top one has only a spring, the bottom one a spring and a shock absorber. The top body bounces for a long time, the bottom one settles quickly.
2DAge 9+15 min
Earthquake: a tall tower and base isolation
A crank mechanism shakes the platform. A narrow tower falls, a wide house stands, and the same tower on soft springs and dampers survives the shaking.
2DAge 8+10 min
Spring cannon: from spring energy to range
Three identical cannons with springs of different stiffness fire at 45°. The stiffer the spring, the farther the ball goes: twice as stiff, roughly twice as far.
3DAge 8+10 min
A door on hinges and a door closer
Three doors get the same push. With no closer the door stays open, with a spring only it rushes back and bangs, and with a spring and a damper it closes smoothly.
3DAge 9+10 min
The washing machine: why it “walks”
Two machines spin a drum with laundry. In the left one the load is spread evenly and the machine stays, in the right one it is in a single lump and the machine creeps across the floor.
3DAge 8+10 min
A mixer: gears and beater speed
One motor spins two beaters through gears: they turn against each other twice as fast as the motor and whip the “dough” in the bowl.
3DAge 8+10 min
Braking distance: dry road, wet road and ice
Three identical cars with locked wheels slide at the same speed on dry asphalt, wet asphalt and ice. The stopping distance on ice is eight times longer.
3DAge 9+12 min
A car’s suspension on bumps
Two identical cars drive over two bumps. The green one has springs only, the red one springs and shock absorbers: the red body settles quickly.
3DAge 9+10 min
Why a bus leans in a turn
A platform tilts slowly. The tall narrow bus tips first, the low one second, the wide one last. A bus in a turn behaves the same way.
3DAge 8+10 min
Why a pyramid is stable and a tower is not
The platform sways from side to side. A tower of ten cubes falls almost at once while a pyramid of ten cubes stands.