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GraviTrax Expansion Set: The Lifter - Extension set for the GraviTrax interactive ball track system. The lifter expansion set takes your marble run...

GraviTrax Expansion Set: Trax - Extend your run! Only playable with GraviTrax starter set.Clear instructions – comes with clear instructions so tha...

Get ready for racing fun with the GraviTrax Starter Set! What you get – GraviTrax is an innovative marble run and stem toy for boys and girls made ...

GraviTrax Accessory Pack: Looping - Make your balls loop the loop!   Only playable with GraviTrax starter set. Clear instructions – comes with cle...