This is doorSTOP...he is a BEAMbot symet. In fact, doorSTOP is my first BEAMbot, inspired by BEAM Guru, Tilden. His rubber feet came from doorstop bumpers. That's how he got his name. His diffuser lid makes him a bit top heavy so as to insure good movement as he twitches away. He thrives on all sources of light. His little dc motor runs direct from his solar circuit via the current delivered by his capacitors. This basic solar engine is too cool. Solarbotics.com has a bunch of bundles and kits to choose from. There's plenty of secondary research available on the web. Just search for BEAM Robotics and enjoy.