18 months & up. This instrument makes a click-click sound that changes with play. It can start as a gentle ripple to a clattering crescendo that brings smiles across toddler's faces. Product Features Instrument Makes Click-Click Sound that Changes with Play Multi-color Discs and Different Sounds Provide Tactile Stimulation Can be Used in Both Home and Educational Setting Measures 2.36"L X 2.36"W X 13.58"H 18 Months and Up