CHEMISTRY. Hydrogen fuel cell
Mirrors and liquid metal alloys
Homemade ice cream without an ice cream maker. AERODYNAMICS. Bernoulli ball
Combination vacuum and pressure pump
Rocket engine. ELECTRICITY AND MAGNETISM. Ring launcher
Rail gun. COMPUTERS AND ELECTRONICS. Computer-controlled radio transmitter
Computer-controlled laser data transmitter
Fun with solderless breadboards
Integrated circuit audio amplifier. MATHEMATICS. Kaleidocycle
Paper geodesic dome. BIOLOGY. Photography through a microscope
Video through a microscope
Using a video camera as a microscope
Listening to electric fish.
