GRAVITRAX BALL BOX Ravensburger 22468

With the GraviTrax® marble run system, you can playfully explore the concept of gravity. Plus, with various expansion packs, you can expand it for endless building and play fun! Increase the speed even further with the expansion sets. Contents: 2 boxes of green balls, 1 box of white balls, 1 box of gray balls, 6 silver balls, 2 red balls, 2 blue balls, 2 green balls, 1 instruction manual