Discover a new dimension of play with the Ravensburger GraviTrax Tunnels – Color Swap expansion. Once the marble enters the tunnel, it “magically” changes color and continues on its way. This effect brings visual surprises to building and racing and adds even more fun for builders young and old.

You can use the tunnel in two ways: either insert a second marble before the start, or integrate it into the track so that the color change happens automatically. Thanks to the modular GraviTrax system, you can easily combine this set with other accessories to create unique marble runs full of action.

• Magical color-change effect – instant transformation of marbles when passing through the tunnel.
• Two usage modes – with a preloaded marble or automatically within the track.
• Creative expansion – ideal for building new tracks and visually striking sequences.
• RAVENSBURGER quality – precise parts, smooth operation, and long-lasting durability.
• Compatible with the Starter Set – requires the basic GraviTrax set.