GraviTrax Jumper $12.99 Default Title - $12.99 Quantity This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available! Move up a level! The Jumper lifts your marble to a higher level and at the same time creates a transit tunnel. Combine the Jumper with your GraviTrax Starter-Set for an exciting addition to your marble run. Can you get your marbles jumping? Recommended for ages 8 years+.