Get closer to the Quadrilla action with three gutters that make your marbles race around the outsides of the colored blocks on their way down. Looks cool and extends run-time. Set includes 14 distributor blocks, a spiral twist and a handy catcher for easy clean-up. 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 four and over.