Hape Quadrilla is a High Quality Wooden Marble Run Construction System. It provides QUALITY TIME for the whole family to play together. The BEST GIFT for your loved ones. It provides endless creative building possibilities and encourages spatial thinking and problem solving. Each of the seven different color blocks has a different function and it's the world's only kinetic marble run. The Challenger has won Spiel Gut (Good Toy) Award and Oppenheim Toy Portfolio Platinum Award. Providing over a thousand happy playing hours, Quadrilla is worth every penny. All Quadrilla marble run sets are crafted with heirloom quality birch and rubber wood for long-lasting marble racing fun. Hape Toy finishes are all non-toxic, child safe and of the highest quality. Hape constructs their toys using FSC accredited wood products. Hape toys stimulate children through every stage of development and help nurture and develop their natural abilities. All Hape products meet or exceed all applicable safety standards. The Challenger is a 147-piece set. It's the only quadrilla set with twin funnels on one rail! The Challenger creates endless Quadrilla marble runs with this engaging set of straight and curved rails, high-velocity funnels, red double-sided rocker, accelerators, blocks, levelers, bases and 50 marbles. As with other Hape Quadrilla Marble Run Construction Sets, it combines easily with other Hape Quadrilla products for expansion and unique combinations that will enhance your child's play experience.