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. Inspired by da vinci, a german engineer invented quadrilla as christmas gifts for his children. It provides endless creative building possibilities and encourages spatial think and problem solving. Each of the 7 different colour blocks has a different function and its the worlds only kinetic marble run. It has won spiel gut (good toy) award and oppenheim toy portfolio platinum award. Providing over a thousand of 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.