Create the Element of Surprise with the GraviTrax – Expansion Tunnels! Now you see it, and now you don’t! The GraviTrax – Expansion Tunnels allows users to add a touch of surprise to their GraviTrax Track System. Use the Tunnels to hide marbles as they travel through your track. Combine the Tunnels with your GraviTrax Starter Set for added mystery! Users can connect their tunnels to create one long tunnel or disperse the tunnels evenly throughout the GraviTrax Track System for fun, interactive play! Will you be able to keep your eye on the marble as it rolls through the ‘hidden’ track? Inspire intrigue with the GraviTrax Expansion Tunnels set! Contents: 2 base plates, 4 curved tunnels, 2 straight tunnels, 2 tunnel switches, 2 vertical U-turns, 2 Bernoulli plastic tracks, 2 O-shaped plastic tracks, 2 catchers and instructions. Please Note: Only for use with the GraviTrax Starter Set. Suitable for ages 8 to 99 years
