Electric Race Track

You know, you probably when you were a child or your child has asked for (according to our age). So it's a difficult race track in plastic that you plug into the wall, normally with two slots to place the cars with small needles to come from below. I have no idea where to put this question, if you have a better idea let me know.

The cars have electric motors soon. The engine power of the track. On either side of the guide slot of the track are metal strips that carry the electrical current. The car has an axis that goes in the slot, but only to guide the car. There is a pair of metal tabs or brushes on each side of the pin. These tabs are in contact with the metal strip into the rail and pull the power of the runway and the engine. The amount of power going to the beach is controlled by a throttle hand. The more power over the car go. If the car loses contact with the strips of metal on the runway, the engine stops.

All this power is low voltage DC is so harmless, if you touch the metal strips on the track.