Expand the GraviTrax Starter Kit marble track with the Tunnels accessory. With this accessory, you can build an even more interesting and challenging track for the marble.

The accessory is intended for the GraviTrax Starter Kit package.

The package includes instructions, 2 base plates, 4 tunnel arches, 2 tunnel straights, 2 tunnel switches, 2 vertical U-turns, 2 Bernoulli plastic tracks, 2 O-shaped plastic tracks, and 2 catch baskets.