12 months & up. Press a key on the piano, hear the sound, and watch the stars pop up! The clear arch guides the stars into different pipes each time so when another note is played the star pops up again. When the keys are pressed, hear piano tones or flip the switch to hear fun sound effects. Introduces cause and effect. Piano measures 9"L x 11"H x 5 3/4"W with clear arch attached. Includes 3 AA batteries.