We got these for our daughter becasue she loves bath time and playing her toy piano.  We figured this would be a cute toy that she would enjoy but we were wrong.  You have to beat the poor dolphins to get them to play a note.  And the note is more of an electronic sound...it's hard to describe it but it's NOT a musical note!  And it never fails after fianlly beating the things enough to get a sound out of them the ring comes loose.  It's just a total pain to use.  Granted she still plays with them in the tub just we could have bought a cheap bag of plastic dolphins at the aquarium and saves 3/4 of the money we spent on this set.