SpaceRail 5000Mm Level 1 Game, Marble Roller Coaster Kit with Steel Balls Marble roller coaster track with a helix elevator to carry SpaceRail marble to the top Includes two different tracks for the marbles to travel, a full single loop, and multiple curves, spirals, and drops Estimated build time: 1-2 hours Contains: 5,000 mm track line, Two steel .5 in marbles, Screw Conveyor Elevator, Arms and holders to place SpaceRail track, Freestanding base to fit entire marble run, and English instruction manual Recommended for ages 15 and up