Construct a simple battery that can power a light.

Send waves down a spring to watch them travel and interact.

Make a home for a colorful community of microorganisms.

This simple toy sounds like a swarm of bees.

A bicycle wheel acts like a giant gyroscope.

Build a rubber-band-powered rolling plastic water bottle.

Store up an electric charge, then make sparks.

Learn about simple circuits with a board you build yourself.

Build a cuíca—a musical instrument—and play with vibrations.

"Cold" metal and "warm" wood may be the same temperature.

Color your perception.

As René Descartes (almost) said, "I sink, therefore I am."