3 years & up. Introduce more tools to play with clay and other moldable materials with these Sturdy Wooden Clay Hammers for Printing Clay or Art Dough. Children will love Imprinting, pounding, and stamping their clay. These tools promote creativity, imagination, fine motor skills, and dexterity. Encourage your children to make unique patterns in their clay. Set of 5 hammers with imprinting designs on both ends. Handles measure 6" long.