3 years & up. Kids will love making designs in clay or dough with this wonderful 9-piece set. Set includes 5 sturdy hammers with 6" handles and 4 wooden clay rollers. Each of the 5 hammers have a unique imprinting design on both ends, giving you a total of 10 different designs. Each of the 4 wooden rolling pins have a distinctive pattern. Pieces are coated to keep clay and dough from sticking.