Create your own marble runs with this exciting construction set. Reproduce the models pictured on the box or enjoy experimenting with your own designs. Interlocking chutes, bridges, columns, spinning-wheels, spirals and funnels can be combined in infinite variations for long-lasting fun. This toy stimulates creativity and reasoning both of which are required to build impressive-looking structures with the correct angles of inclination. With the exciting elevator you can create endless cascades of marbles with mesmerizing visual effect.