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Build a rubber-band-powered rolling plastic water bottle.
Two pendulums influence each other’s motion to create Intriguing patterns.
A dipping bird seems to go forever—but it's not perpetual motion.
Make multiple images of yourself.
Your experience of the world influences what you see.
How do you put a straight rod through a curved slot?
Measure the thickness of a sheet of paper.
What you see is often affected by what you expect to see.
Speed up your spin.
Surprisingly, a flat panel rolls smoothly on non-circular rollers.
Air trapped between two pieces of clear plastic produces rainbow-colored interference patterns.
Explore energy transformations by rolling a marble on a track.
Play songs by banging a PVC pipe against your palm.
It’s all done with mirrors.
Big swings from little pulls grow.
Explore resonance to discover how objects vibrate at certain frequencies.
Eye'll be seeing you.
Use your breath to make a visible change in an electric circuit.
What happens when you blow a fuse?
The perceived color of an object depends on its background.
Square wheels roll smoothly on a round road.
Shake just right to see the light.
Components of force make a toy walk and stop at just the right time.
Whirling water creates a tornado in a bottle.
Sometimes, you’re your partner’s splitting image.
Make dendritic diversions and bodacious branches.
Focus the invisible light from an electric heater.
Polarized light passing through sugar water reveals beautiful colors.
A face seen upside down may hold some surprises.
Discover art and science in a myriad of spherical reflections.
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