Constructor GraviTrax: Extension Tunnel Pack

GraviTrax - the power of gravity! Extension Tunnel pack includes: 4x Curved Tunnels/ 2x Straight Tunnels/ 2x 'Y' Junction Tunnels/ 2x Card Bases/ 1x Vertical U-Turn/ 2x Drop Rails/ 2x Bent Rails.

GraviTrax allows you to design and build your own marble runs and experiment with gravity / magnetism and kinetics to propel your marble to the finish. With a variety of tiles levels,tracks and elements you can control the speed of the marble.