The interactive marble run system from Ravensburger. With the GraviTrax marble run system, you can build your own marble run world by creatively using the laws of gravity. Use the various construction elements to create an action-packed course and bring the marbles to the finish line using magnetism, kinetics, and gravity. With the GraviTrax marble run system, you can playfully discover gravity, and with various expansions, it can be enlarged for limitless building and playing fun! Add even more speed with the expansion sets. The interactive marble run system from Ravensburger. Let the marbles jump! Defy gravity and make your marbles bounce impressively over the track with the trampoline. Combine the trampoline with the GraviTrax Starter-Set and bring even more action to your tracks. How far and how high will your marble jump on the trampoline over the track? Contents: Manual (D, F, I, EN, NL, E), 2 trampoline action blocks, 2 angled vertical pieces. Only playable with the GraviTrax Starter-Set.