With the GraviTrax element color swap, the color of the ball changes as if by magic. What color does the ball have next?The GraviTrax Element Colour Swap provides for a color change of the passing through spheres. Rolling a ball into the color swap changes, when leaving the element, as by magic the color of the ball changes. The illusion can be done in two ways. On the one hand, the element can initially be loaded with a ball or the color swap is adequately built into the track. Combined with any GraviTrax starter set, the Color Swap brings a whole new swing in the track.GraviTrax is a flexible, interactive ball track system for children aged 8 and over: With GraviTrax, children, young people and adults are not only building simple ball tracks. You create unique ball track worlds. By freely designing the ball tracks and exploring the rolling behavior of the balls, the understanding of science is strengthened and gravity can be experienced at first hand. The GraviTrax Universum contains