With the Dynamic Looping Set, a loop point can be built, with the guidance of building instructions, and can be creatively integrated into many Fischer Technik marble runs. With the mechanical track crossing, the route can be shifted so that the marbles either shoot through the loop or follow another route. With this set, avid Fischer Technik Dynamic fans can expand and enhance their own marble run with a new action element. Specifications: - Age: 7 Years + - Item Dimensions: 22.5 x 6.5 x 15cm