GraviTrax Expansion Tunnels fidget freefalls and even a cannon

freefalls and even a cannon

Ideal for Ages 3+

Do it again and again and again

With filled squishies

How much power does your ball need to loop the loop

GraviTrax Expansion Tunnels fidget freefalls and even a cannonraviTrax Expansion Set: Tunnels Create the element of surprise with the GraviTrax Tunnels Expansion set! Use the tunnels to hide the marbles as they travel through your track. Combine the tunnels with your GraviTrax Starter Set for added mystery to your track. Will you be able to keep your eye on the marble as it rolls through the tunnels? GraviTrax Tunnel extension is a great tunnel system and provides on the ball track for many moments of surprise.