GraviTrax Accessory Ball Box

The interactive ball track system by Ravensburger. The Accessory Ball Box is a must-have for every GraviTraxer! The 4 boxes in the cool GraviTrax height brick design are green, grey, and white. Two of the boxes are filled with silver and colorful balls to add even more balls to your track. With the GraviTrax ball track system, you can playfully discover gravity, and with various expansions, it can be enlarged for limitless building and playing fun! Add even more speed with the expansion sets.