Quadrilla Twist and Rail Set
The Quadrilla marble run is a truly “open-ended” toy that can help a child assemble structures that will demonstrate some fundamental – but fascinating – principles of construction. A child may not know it, but Quadrilla can help her or him experience the process of design as they build their own marble run, understand cause and effect and see first hand how kinetic energy differs from gravitational energy. Of course, the most important principle the child will experience is the fundamental principle of fun. Each Quadrilla set comes complete with an extensive assortment of beautifully crafted, solid wood rails. Each set also contains a variety of colored wood blocks that serve as connector channels. Together these pieces allow the child to construct either simple structures or complex, multi-tiered structures.