Science Buddies
Science Buddies: Building Banjos
It is said that you can't play sad music on a banjo. Following the instructions for this science fair project, you can make your own rough banjo and see effect the resonator has on the sound. The Science Buddies project ideas are set up...
Exploratorium
Exploratorium: Science Snacks: Physics/mechanics (Force and Motion)
A collection of mechanics activities. Many pertain to Newton's laws of motion. Step-by-step directions provided with illustrations. Great for teacher demos or student projects.