The Vertical extension allows you to place elements in your path exactly where you need them, while saving height stones! Build routes on several levels above and below each other and lead routes through columns. Construct cleverly and let the ball pass through a tunnel on its way! Combine the extension with your GraviTrax starter set and take your track to a new level! How high and how clever can you build with the Vertical extension? Contents: 12 columns, 2 medium walls, 2 long walls, 16 balconies Extension set for the interactive ball track system GraviTrax The GraviTrax PRO extension Vertical can be combined with all GraviTrax items. Each sold separately.