Start by building one of the layouts pictured on the box. Watch your marbles navigate the blocks, spiral gutters, spiral twist and other features as they race down to the catcher. Now use your imagination to build your own fantastic marble runs! • Marble-run construction toy made with durable wood and non-toxic, water-based paints • Includes 14 distributor blocks, 3 curve rails, a straight rail, a spiral twist, 8 height adjusters, 4 stabilizer rings, 6 accelerators, 2 hole shutters, 50 marbles, 2 small and one large spiral gutters, and one catcher • Spiral gutters create more run-time and bring you closer to the action • Helps to develop spatial thinking and an understanding of Science, Technology, Engineering and Mathematics (STEM) principles • Praised by the Wall Street Journal as the perfect toy for teaching children how to code • Compatible with all Hape Quadrilla sets • For ages 4+