How things work
Engines & machines
Look inside engines, motors and gears. 12 works
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Seesaw Balance
Place weights on a seesaw until it sits level.
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Gear Trains
Change the teeth and see how speed and direction change.
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Four-stroke Engine
Follow the four steps inside a car engine by watching the piston.
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Rotary Engine
A triangle-shaped rotor turns and changes the size of three chambers.
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Electric Motor
See why a coil keeps turning when electricity flows.
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Ways to Generate Power
See how heat, water, wind and sunlight become electricity.
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Manual Gearbox
Open the clutch and see what changing gears does.
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Planetary Gears
Change which part is held still and watch the other parts turn.
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CVT
Move the belt up and down to change speed smoothly.
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Differential Gears
Watch the wheels turn at different speeds through a bend.
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Bicycle Gears
Choose the gear sizes and compare how far one pedal turn takes you.
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Torque and Power
At what engine speed are turning force and power the biggest?