Set of 4 wood straight tracks and 1 U-shaped catch track with embedded magnets and a marble groove. Kids will spend hours rearranging and creating new configurations of tracks for their marbles to slide down. Can attach to magnetic metal surfaces (such as refrigerator, dishwasher, magnetic chalkboard, etc). Package includes a few standard-sized marbles. Ages 3+. Note: marbles are a choking hazard for small children.