Ravensburger's interactive ball track system.
The Accessory Ball Box is a must-have for every GraviTraxer!
The 4 boxes in the cool design of GraviTrax height stones
are green, gray and white. Two of the boxes are full of
silver and colorful bullets, to give you even more bullets
add job.
With the GraviTrax ball track system you can discover gravity in a playful way and it can be expanded with various extensions for limitless building and playing fun! Add even more speed with the expansion sets.