Get started building your own marble runs with this Hape Quadrilla Wooden Marble Run. FEATURES: ENDLESS POSSIBILITIES: Use the building ideas from the included instructions or your own imagination and engineering vision to build different marble rollercoaster constructions with this Quadrilla wooden building set., STEAM: This is a perfect racing toy that will encourage children's spatial thinking, problem-solving capabilities and teamwork skills, but also aid their STEAM development., WOODEN BLOCK TOY SET with a dynamic marble run feature. Arrange the blocks in various ways and enjoy watching the marbles glide through!, SAFE TO PLAY WITH: The marble-run construction toy has been made with durable wood and non-toxic water-based paints making it the perfect choice for your family. The recommended age use of the product is for ages 4 years and older., DOWNLOAD THE HAPE QUADRILLA APP that has tons of step–by–step instructions. Build fantastic tracks that offer new challenges and help grow young imaginations. Share in the joy of custom marble tracks and post yours to other Quadrilla enthusiasts. WHAT'S INCLUDED: 9 distributor blocks, 2 curve rails, a spiral twist, 4 height adjusters, 4 stabilizer rings, 3 accelerators, 2 hole shutters, 30 marbles, a windmill spinner and a universal clamp. DETAILS: Age: 3 years & up, Wipe clean, 21.26 x 7.87 x 12.99 inches, Plastic, E6021, Imported. Size: One Size. Color: Multi. Gender: unisex. Age Group: kids. Material: NONE.