I'm gong to force my kid to take a few years of piano. She can quit after two years or so but I want her to get a chance to develop her ear and lean how to read music on a harmonic instrument. I know a few professional musicians (commercial and mercenary touring) most of them cut their teeth on piano early. Not that I want my daughter to grow up to be a concert pianist or even just a shiftless musician but I would like the joy of creating beauty cooperatively to be easily open to her. Music seem like one of the most assessable ways to make art in groups, it's a grand fun thing to do. I would be surprised if she doesn't play some sort of instrument at some point in her life after piano, we listen to a lot of music in our house and have a few different instruments sitting around. I've also bought her a variety of 'kid' instruments that she really gets a kick out of (recorder, bongos, harmonicas, glockenspiel, wood blocks, a little accordion and various whistles).