With the Ravensburger GraviTrax Extension Building expansion set, you can flexibly expand your interactive marble run. This expansion contains additional base plates, height tiles, switches, and further curve and action elements. This allows existing starter sets to be enlarged and new, more complex track layouts to be created. While building, the system playfully teaches physical laws such as gravity. The colored and transparent components integrate seamlessly into the existing GraviTrax system and offer new combination possibilities for creative marble runs.