Gears, meet treads. Kids can design and build the STEM creations of their dreams with Gears. Gears. Gears. Treadmobiles from Learning Resources. This 108-piece STEM building set inspired by our best-selling Gears. Gears. Gears. series, this build-it-yourself toy includes all-new special tread components for designing and building robots, cars, and machines that move like tanks and conveyor belts. Kids can follow along with the included STEM Activity Guide, or use their imaginations to devise open-ended builds of their own—with 108 pieces, they have everything they need to make their creations come to life. Every time they build a new Treadmobile, kids also boost their early engineering, critical thinking, and other essential STEM skills. All pieces included in Gears. Gears. Gears. Treadmobiles work with all other Gears. building sets, so the possibilities are as fun as they are limitless. This set is also perfect for school STEM club and other group play.