THIS SET WAS MADE IN 1963.IT IS BATTERY POWERED & EACH 1/43RD NOREV CAR CAN BE CONTROLLED SEPARATELY.IF THE CARS CORNER TOO FAST THEY CAN TURN AROUND & GO THE OTHER WAY.THIS IS A RARE SET.THE CARS ARE MOVED BY SPRINGS UNDER THE TRACK.THE 1/32 SCALE CARS WERE MADE IN 1966.