The Ravensburger GraviTrax PRO Vertical Starter Set enables the construction of three-dimensional marble runs reaching upwards. With over 100 components, including special pillars, walls, and transparent levels, it allows for flexibly designed tracks across multiple floors. The interactive marble run system uses gravity to guide spheres through tunnels, curves, and free-floating sections. The elements can be combined in versatile ways to continuously construct new vertical track layouts. The set provides an ideal foundation for building challenging track architectures.