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 building elements to create an action-packed course and guide 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 expanded for limitless building and playing fun! Add even more speed with the expansion sets. The interactive marble run system from Ravensburger More information Your marbles do a loop! With the looping, you turn the world upside down for a moment. Combine the looping with the GraviTrax® Starter Set and add even more action to your marble run. How much speed does your marble need to get through the loop? With numerous expansion sets like this Looping, the free building and construction of the interactive GraviTrax® marble run system becomes even more interesting and exciting every time! More possibilities - more fun! Please note: contains small marble(s), not suitable for children under 3 years due to choking hazard. Contents Manual (D, F, I, EN, NL, E), 1 looping action block, 1 long plastic track, 2 medium plastic tracks, 3 short plastic tracks. Only playable with the GraviTrax Starter Set