This creation is really more about modelling cars than about robotics. One NXT motor drives the car, a second NXT motor steers it, and a third controls the transmission. Apart from the NXT brick, the motors, and the touch sensor, the parts are not from the NXT kit. Most of the parts are from Lego set 8421, a large Technic crane. The full description of this vehicle contains a video and many more images. Don’t miss the video!