Add fast and furious speed to any Quadrilla set with spiraling funnels, rails, accelerators, and a high - velocity seesaw, and basic blocks, levelers and bases. Adding different pieces can make your marble run faster or slower. See how each piece works.
Add power and speed to any Quadrilla building set with this duo of a high- velocity twin funnel and accelerators. Where you place the funnel in your structure makes a difference in the speed. Test what works the fastest.