30 task cards in various difficulty levels invite children to tackle challenging logic puzzles. In The Flow, the focus is on the transparent layer, whirlpools, catchers, and FlexTubes. At the start of the game, the starting and target points, as well as the elements to be used for building, are specified. If the ball rolls through the FlexTube from start to finish, the task is solved. With GraviTrax, the fun of building knows no bounds. The GraviTrax marble run system can be infinitely expanded with extensions, ensuring limitless building and play enjoyment. By freely designing the marble runs and exploring the rolling and flying behavior of the marbles, children's understanding of science is sharpened, and gravity is experienced up close.