rainbow Musical Ball Run Assembly SetChildren may build up this ball run by themselves. Sorting the colors at their discretion enhances creativity. Marble races can be conducted for added excitement. Includes a double spiral run for thrilling experiences. One can let a wooden bead run against the included bell. Encourages questions like: Who will be the winner? Which ball is the quietest running down the path? Which one makes the most noise? The ball run can be dissembled and rearranged