Meet the Robo Trax from Air Hogs: an all-terrain RC tank that transforms into a robot at the push of a button to stand up and balance itself. It can handle rocks, gravel, grass, and sand. The tank comes equipped with missiles and 2 missile bays.
Robo Trax has a wireless control range of 100 feet. You can control it indoors or outside. Like what you see? You can get this for under $75 at this time.