This expansion brings six balls for the GraviTrax track and a launch stone. With the spinner, up to six balls can be launched simultaneously. By gently turning the green part of the stone, the balls are sent off for a race in the interactive ball track world. Combined with a GraviTrax starter set, three times as many balls can be launched at once as before. What exciting intersections will arise? The outputs of the spinner are newly arranged, allowing for new angles to be tested when launching the balls. It includes three silver balls and one ball each in the colors red, blue, and green. With GraviTrax, building fun knows no bounds. The GraviTrax marble run system can be infinitely expanded with extensions, guaranteeing limitless building and play enjoyment. By freely designing the marble runs and exploring the rolling and flying behavior of the balls, understanding of science is sharpened, and gravity is experienced up close. The STEM symbol on the products indicates a game category where science is playfully experienced. STEM (Science, Technology, Engineering, Mathematics) corresponds to the German MINT (Mathematics, Computer Science, Natural Sciences, Technology).