Meet the mBot Ranger kit: a 3-in-1 transformable STEM robot that can be used to build a robot tank, 3-wheel racing car, and a self-balancing car. These robots can be programmed using a tablet or laptop.
The Land Raider is capable of moving on a variety of terrains. Transform your Land Raider into a Dashing Raptor, and you will have a racing car that runs and spins fast. The robot kit has a visual programming interface. Ships for under $190 at this time.