This toy is based off the principle of friction. The toy is an alteration of a remote control car. The child would play with the toy the same way, but in this model the car has many sets of interchangeable wheels. The wheels shown include smooth wheels, which would work well on tile and wood floors, wheels with small bumps that would work well on carpet, and wheels that are more suited to handle uneven terrains, like gravel. The child would see how the friction between the wheels and the ground could affect the motion of the car.

This car could range from relatively cheap to fairly pricey, depending on the size of the car and the quality of the battery. The car itself could be made very durable, as long as it does not get wet. It should also be a very safe toy, assuming the wheels are large enough to not qualify as a choking hazard.