Gravitrax Extension 268153 Colour Swap MIX AND MATCH ANY 2 FOR £10

The color swap brings a new element of surprise into the GraviTrax world. As if by magic, the ball changes color when it passes the stone. This can be prepared in two ways. Either by loading the stone with a ball at the beginning, or by installing it accordingly in the track. With the illusion of color change, the color swap provides a visual highlight. How often can the color of the balls be changed during a run?