This robot is named for the main character in the song "Baby Brother" by the White Stripes, although I have yet to get it to crawl on the ceiling, swim underwater, or fly. He does track to light nicely, and with his whiskers avoids most obstacles. His brain is a PIC 16F684 micro-controller programmed in assembly language. The power supply is boost-regulator and motor control is a dual H-bridge, both purchased commercially. The motor brackets and wheels are also commercial parts and the rest is surplus and recycled scrap all put together with point to point wiring on perf-board. He's about 75 mm in diameter and about 60 mm tall to the top of his eyes.