The GraviTrax Color Swap accessory creates a magical experience as your marble rolls through a tunnel and unexpectedly changes color! This add-on is useful for pausing or slowing down the marbles.

Building with GraviTrax tracks stimulates imagination, ignites interest in science (physics, spatial geometry, and gravity), and provides hours of fun for both adults and children.

With GraviTrax Pro Starter Set and additional expansion sets, you can infinitely expand your creations. Moreover, the entire PRO series (black packaging) is compatible with GraviTrax (white packaging), working seamlessly with all sets and accessories.