3 years & up. Create endless designs in clay with this set of Hammers and Rollers with Various Designs for Rolling Clay or Dough. This set of rollers promotes creativity, fine motor skills, dexterity, and sensory play. Children will enjoy creating patterns and designs in clay and other moldable mediums. The set includes 4 rollers, one smooth and 3 with different imprints. The set also includes 5 hammers with 6" handles with imprints on both ends and 4 stampers with unique patterns.