3 years & up. With the Link A Shape, children can build interesting figures that fit together any way they want. Simply slide the shapes together using the openings on the sides of the shapes. Link A Shape is a fun way for children to develop fine motor functions. Each shape is made of rugged, flexible plastic and comes in bright colors. The shapes vary and include squares, triangles, rectangles, circles, and more. The set includes 210 pieces, so children have a lot to build from.