The GraviTrax POWER Starter and Finish elements include two electronic components that are part of the Ravensburger marble run system. A new marble is set to start as soon as the previous marble has completed the track and reached the finish line. With the GraviTrax POWER Starter and Finish elements, this is no problem. The Starter and Finish arena can hold up to 7 marbles each. The two POWER elements of the marble run are connected wirelessly. As soon as a marble passes through the two-part finish, a new marble is sent onto the track, providing even more action and significantly longer run times.

GraviTrax is a flexibly expandable, interactive marble run system for children aged 8 and up: With GraviTrax, children, teenagers, and adults can not only build simple marble runs but also create unique marble run worlds. By freely designing the marble runs and exploring the rolling behavior of the marbles, users sharpen their understanding of science and experience gravity up close. The STEM symbol on Ravensburger products indicates a category of games that makes science engaging and fun. STEM (Science, Technology, Engineering, Mathematics) corresponds to the German MINT (Mathematics, Computer Science, Natural Sciences, Technology). Through various expansions, children can enlarge and continually redesign their marble runs.