The Turtle Tot is a two-wheeled robot, that is about a foot in diameter. It communicates with a computer via RS-232. The supporting software was made by Harvard Associates. I think the actual robot was made by Flexible Solutions, a Tasmanian company. The one I have is missing several chips, and I am trying to find out what they are. If anyone has documentation on this device that includes the board layouts, I could use some help. Thanks, -- John Tinker