Start building your own marble runs with this Quadrilla Starter Set. Toss two marbles into the top and watch them race each other down different paths. Playing Tips Start by building one of the examples shown on the box. Toss the marbles into the top block and watch them race each other down different paths. Begin your STEM (Science, Technology, Engineering, and Mathematics) journey of discovery now! Features • Marble run building toy made with sustainably sourced wood and non-toxic water-based paints • Includes 9 distribution blocks, 2 curves, a spiral twist, 4 height adjusters, 4 stabilizer rings, 3 accelerators, 2 gap closers, 30 marbles, a windmill spinner, and a universal clamp • The windmill spinner can be attached to any track with the included clamp • Endless possibilities to change the layout. See enclosed guide • German-made design inspired by the Da Vinci Circle • Helps develop spatial thinking and an understanding of science, technology, engineering and mathematics (STU) principles • Touted by The Wall Street Journal as the perfect toy to teach children to code • Compatible with all Hape Quadrilla sets • Suitable for ages 4 and up