Start building your own marble runs with this Quadrilla starter set. Throw two marbles into the top and watch them race down different paths against each other. Playing Tips Start by building one of the examples shown on the box. Throw the marbles into the top block and watch them race down each other. Start your STEM (Science, Technology, Engineering and Mathematics) journey now! Features • Marble track building toy made from sustainable wood and non-toxic water-based paint • Includes 9 distribution blocks, 2 curves, a spiral twister, 4 height adjusters, 4 stabilizing rings, 3 accelerators, 2 hole sealers, 30 marbles, a windmill turner and a universal clamp • The windmill turner can be attached to any rails with the included clamp • Endless possibilities to change the layout. See attached guide • German-manufactured design inspired by the Da Vinci Circle • Helps develop spatial thinking and understanding of scientific, technological, engineering and mathematical (WTBW) principles • Recommended by The Wall Street Journal as the perfect toy to teach children to code • Can be combined with all Hape Quadrilla sets • Suitable for 4 years and older