A slot car is an electrically powered miniature vehicle, running on a track which has a slot  the car has a little pin underneath, so the slot guides the car around the track,  said Frank Tiessen, president and CEO of Carrera Revell of Americas.

Very early Scalextric slot car models in 1:30 scale, circa 1957. These metal-bodied racers were electrified versions of Scalex clockwork cars, and are among the first commercially offered slot cars of the modern era.