Magformers Curve 40Pc Set arrives Rainbow Squares, Arches, Sectors, Cones and Spheres so you can create wonderful organic builds. Create open-ended structures and follow along with step-by-step idea booklet to build arches, towers and more. The original and authentic Magformers. Perfect for brain development, critical thinking and STEM education. Follow the Step-by-step educational idea booklet for ideas and instructions. Build in Rainbow colors with 8 squares, 8 arches, 8 sectors, 8 cones and 8 1/8 spheres. Each geometric shape contains magnets that never reject, so you’ll always hear the Magformers click. When playtime is over, use the magnetic power to simply stack and store.