Techno Gears Marble Mania sets are multi-piece construction sets that allow aspiring engineers to create their own working masterpieces. This set includes more than 80 translucent pieces kids can use to build and create their own marble and gear run. Once completed, the spring-loaded shooter launches the marble to the top of the build, where the track and the fun begin. Aligns with STEM standards. For ages 6 and up.