definately could be a long thread... there are a bunch of different ways to do everything... like figuring out how far it turns... there is: gyros, compass, "mouse balls", hall sensors on the wheels, IR base stations (celestial navigation), and im sure there has to be another 100 ways that i didnt mention...

right now im thinking i might just make it so it hides from light (photophobic) during the day, and then comes out to play at night... at least until i can come up with something better for it to do...