Create a stunning dome, ball, or a variety of different geometric shapes: · Children and adults can work in tandem to create amazing structures · The dome consists of 3 shapes - (12) pentagons, (30) squares, and (20) triangles · Pieces are large and chunky, witht the square measuring 15.75" · Explore geometry, construction, and interactive play with this set · Children can also simply throw sheets over it to create a fort!