Key board or piano. A musical instrument. It produces SOUND . it also serves as an aid to LEARNING. Kids learn how to play PIANO from young age. Key board or piano. A musical instrument. It produces SOUND . it also serves as an aid to LEARNING. Kids learn how to play PIANO from young age. Key board or piano. A musical instrument. It produces SOUND . it also serves as an aid to LEARNING. Kids learn how to play PIANO from young age. Key board or piano.