Once the guitars are completed, the kids in Paul Rubenstein's Working Playground "Building Music" class make their amplifiers. It's up to each student to create their own enclosure for the circuit, so each amp has it's own distinctive look. The kids solder together the circuits following this schematic from runoffgroove.com. Thanks to Small Bear Electronics for giving us a good deal on parts, and to MWS Wire for the magnet wire for the guitar pickups! The kids make square wave oscillators, too!