HAPE QUADRILLA WOODEN MARBLE RUN CONSTRUCTION: CLIFFHANGER - 94 PIECE SET - Get closer to the Quadrilla action with three gutters that make your marbles race around the outside of the colored blocks on their way to the bottom. Looks cool and extends run-time. Gutters: Spiral gutters create more run-time and bring you closer to the action. A Lot Like Coding: Hape Quadrilla, the unique marble run system has been praised by The Wall Street Journal as the perfect toy for teaching kids how to code. Safe to Play with: Part of the set is built in a sustainable way using fasal as an alternative for wood. Made from the wood pellet and corns starch, fasal is moisture-proof and exceptionally strong. 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. Compatible with other Hape Quadrilla Marble Run, but is not compatible with Hape Marble Run E1100 E1101 E1102.