The Ravensburger GraviTrax Bridges extension brings new construction possibilities to your marble run. With the three included bridges and various track lengths, you can easily bridge distances on your track. The set can be flexibly combined with all other GraviTrax products to construct even more complex track layouts. While building and experimenting, you actively engage with the physical principle of gravity. An illustrated manual provides a step-by-step introduction to using the bridge elements. This extension is ideally suited to creatively expand existing marble run systems.