The turntable offers children aged 8 and up more possibilities for creative building and greater control over the paths of the balls. As the balls pass through, they cause a mechanical turntable to rotate. When a ball rolls down through the stone, it changes direction and simultaneously turns the turntable. This allows for more variations in the track and control over the ball's paths. When combined with a starter set, complex track layouts can be planned and optimally controlled. How often can the turntable be turned in one go? With GraviTrax, building fun knows no bounds. The GraviTrax marble run system can be infinitely expanded with add-ons, guaranteeing limitless building and play enjoyment. By freely designing the marble runs and exploring the rolling and flying behavior of the balls, children sharpen their understanding of science and experience gravity up close. The STEM symbol on the products indicates a category of games where science is experienced in a playful way. STEM (Science, Technology, Engineering, Mathematics) corresponds to the German MINT (Mathematics, Computer Science, Natural Sciences, Engineering).