Zoomorphs is a building system with pieces that snap together easily, and join snugly. Each set contains four to six animal characters that presently exist or that once existed in nature. Each set contains 28-47 interchangeable pieces. They are easy to use and fun for girls and boys age 4 and up! All sets are interchangeable, so you can build even more beasts! The user can also morph these pieces into fabulous fantasy characters.