Great for the youngest builders and aspiring architects. Soft, colorful foam pieces feature notches so they can be fit together in endless 3D arrangements. When the structures are inevitably knocked down, no one will get hurt. Features a variety of flat shapes, including triangles, circles, squares and more, plus small, flat, rectangular connector pieces without notches. 107 pieces in a variety of shapes and colors. Shapes range in size from 2-5/8 x 1" to 5-1/4 x 2-1/2". Approximately 1/8" thick. For ages 3 and up.