The Color Swap, a GraviTrax extension set, adds a flair of magic to your marble run.
Hide a marble in the tunnel, and when another marble enters the tunnel, the momentum propels the new marble out the other side. Now it seems that your marble has changed colour!
GraviTrax is a creative, modular, expandable track system that challenges children to use their imagination to design and build their own marble runs! Electronics-free, GraviTrax construction sets use STEM-friendly concepts while building critical thinking and problem-solving skills. Completely open-ended, every GraviTrax set has a boredom-busting variety of play options for hours of fascinating fun.
This is an Extension set, and requires a GraviTrax Starter Set in order to work.
For 8 years +
