Bits and Pieces - Delux Gear Master Marble Run-Gears Marble Run Game, Building Game, Marble Roller Coaster - The Gear Master 463PC Create a marble maze experience with the Gear Master with automatic transporter Build extraordinary tracks from plastic rails and snap-together components This marble roller coaster will have kid engineers creating turns and twists for non-stop fun and excitement Executive Gear Master can be built and rebuilt with its 470 plastic construction pieces, 19 marbles, suspension wire, plastic base and battery operated transporter 2 "AA" batteries required, not included