The technology underground is a thriving, humming, and often literally scintillating subculture of amateur inventors and scientific envelope-pushers who dream u
These are the homemade machines that you’ve dreamed of building, from the high-voltage Night Lighter 36 spud gun to the Jam Jar Jet, the Marshmallow Shooter,
Discover high-tech gadgets, design robots and machines, and solve all sorts of technological puzzles in this innovative activity book filled with inventions to