A quick build, probably not going to do too good. It's a modified LEGO technic racing truck, with an RCX controller. Goes moderately fast, but loses the line a lot.
A LEGO MindStorms NXT sumo. It has a wedge made out of a baseplate. Made by Ben & Mary.
This is made from a lego mindstorms NXT base. It is the second version of a previous sumo that I have made. It is a simliar structure to a battering ram.
Stock Parallax S2