Arduino Car
instructions on how to build an Arduino based car using either an available toy car with two main motors (one for steering) and one for the forward/backward motion.
The other classical project is the RC tank. In this case the tank uses both left or right motors for moving and steering. If both right motors move forward and both left motors stay still or move with lower speed then the tank turns right.
In this tutorial we are going to build both a car and a tank.