Quadrilla VertigoVertigo marble run is a mix of spins, drops, seesaws and speed that will confuse little marbles as to which way is up. The Vertigo marble run set comes with straightaway rails, three spiral funnels and a seesaw for swift, stimulating fun. Quadrilla's Vertigo can be combined seamlessly with Quadrilla's other marble run sets. All Quadrilla marble run sets are crafted with heirloom quality birch and rubber wood for long lasting marble racing fun. Hape