The Ravensburger GraviTrax Extension Push adds new, dynamic track sections to your existing marble run system. With the special Push element, the marbles are accelerated and redirected along the track in an innovative way. This marble run extension can be flexibly combined with all GraviTrax starter sets and allows for creative constructions. While building and experimenting, children aged 8 and up playfully learn the principles of physics and mechanics. Perfect your marble run and experience how the marbles overcome new hurdles.