I love those things! I'm gonna try to make one some day. I think all you need for a simple 1 switch box is a battery pack, rocker switch, small reversable motor or modified servo motor, a 2 position toggle switch, some type of arm, a bar that goes to the motor the arm will be on, (usually wood for easier construction or even metal if you can weld), and some wires. I'm sure there's some logic controllers out there for more advanced builds, but that's above my skill level for the moment. Taking the electronics class this coming January so maybe I'll figure them out fairly soon. :geek: