kids and adults play dodgem ride battery operated bumper cars

Bumper cars or dodge bumper car  is the generic name for a type of flat ride consisting of several small electrically powered cars which draw power from the floor or ceiling, and which are turned on and off remotely by an operator. They are also known as bumping cars and dashing cars

There are two types of Bumper Car, battery bumper car (electric bumper car) and ground grid bumper car (ground net bumper car).
Battery Bumper Car is supplied by batteries power, the motor power through differential bag by the gear wear to the rear axle to achieve the car running, is arranged in the circuit board can control the machine running time, time to auto power off.
Ground Grid Bumper Car is from the floor (Also called network). The plate is made of a positive electrode, a negative floor plate is laid in turn, while the body has a contact floor to contact the floor to obtain a link with the power supply.