The last time I played with a mouse in the shape of a car, I ended up with a deformed claw for a hand thanks to the square back end of the car in question. The DriftX Mouse looks to have fixed that issue slightly with a more rounded vehicular design.
Costing $50, the wireless mouse has a wireless USB dongle that can be conveniently stored in the car’s boot, and is available in five different colours, plus there are a couple of wired versions if you prefer to pretend your car mouse is dragging a tow chain behind (or in front) of it.