Gravitrax Go Rotative Game by RavensburgerGravitrax Go Rotative Game by Ravensburger. GraviTrax GO contains everything for an easy and uncomplicated entry into the GraviTrax universe. Thanks to the included instructions as well as the additional tasks, creative building is introduced in a playful way. In this way, the endless possibilities of GraviTrax can be explored with lots of fun and action. The included Action Elements also provide new ideas and creative tracks. Experience the marble