How cool is this?
Rainbow: designed by Heiko Hillig. This is one of the bestselling Naef toys! Experience the calming and relaxing power of interaction with this beautiful rainbow. Wooden arches symbolise the rainbow. Both an educational diversion and tuning fork at the same time. High-grade, processed plywood in brilliant colors, make Rainbow an object of both artistry and fun with an ascetic quality. Trust your feelings and find the balance point like a virtuoso. The Rainbow offers endless combinations of colors and sounds.