Kids can make their marble runs more fun and creative when they add a loop to it. This is the perfect add-on for the Wall Coaster Starter Set. The loop can be configured into multiple shapes for more marble run fun! For ages 5 years and up. Wall Coaster Starter Set Includes: loop sections, wall tacks and 2 marbles.Wall Coaster Starter Set Dimensions: 4" x 2" x 6"WARNING: CHOKING HAZARD-Small Parts. Keep away from children younger than 3 years.