The Ravensburger GraviTrax Pro Power Element Dynamo expands existing marble runs with a dynamic marble redirection feature. The set includes four parts and integrates seamlessly into the GraviTrax marble run system. Using the integrated rotating mechanism, incoming marbles are caught, set into motion, and redirected across different levels. The design combines the vertical height differences of the Pro series with the impulses of the Power series. This allows you to plan varied track layouts and purposefully control the path of the marbles through mechanical movement sequences.