Mini 4WD
Tamiya's small battery-powered four-wheel-drive cars that race on walled tracks with no remote control.
A Mini 4WD is a small Tamiya kit car with a motor, two AA batteries and four-wheel drive. There is no steering or remote: the walls of the track guide the car.
The skill is the setup
Racers tune the motor, gears, tires and rollers before the race. A good setup is fast and stays on the track.