Children from the age of 8 can solve many exciting puzzles with GraviTrax The Game Flow ! 30 task cards with different levels of difficulty invite children to solve challenging logic puzzles. The Flow focuses on the transparent plane, swirls, catchers and FlexTubes. At the beginning of the game, the starting point and destination, as well as the elements to be used for building, are given. If the ball rolls through the FlexTube from start to finish, the task is solved.With GraviTrax, building fun has free rein. The GraviTrax ball track system can be expanded infinitely through extensions, which guarantees unlimited building and playing fun. By freely designing the ball tracks and exploring the rolling and flight behavior of the balls, the understanding of science is sharpened and gravity can be experienced up close. The STEM mark on our products signals a game category where science is experienced through play. STEM (Science, Technology, Engineering, Mathematics) corresponds to the German MINT (mathematics, computer science, natural sciences, technology).