Fun and fascinating marble run kit that's easy to build. This bright and vibrant 45 piece set is easy to assemble, all of the plastic pieces simply slot together and are fully interchangeable. Copy the design on the box or make your very own creation with the Windmill, Whirpool and Chicane to increase the fun. Building a marble run encourages a child's imagination and problem solving skills, along with logical thinking. And fun too of course!