I happened to run across these online today, how cool! I wanted to get my daughter some hello kitty earphones but I was concerned about protecting her hearing. While these don't have hello kitty on them, they are safe to practice her piano or electronic books with, and so on.
http://www.amazon.com/Maxell-190338-Kids-Headphone-Black/dp/B001UAGQPW/ref=sr_1_1?ie=UTF8&qid=1327787190&sr=8-1There are actually a few different brands out there for kid safe headphones with volume control, so I need to do some research as to which ones are the best, but I am really happy such a product exists. I did think about how neat a wireless option would be, but then I realized I don't trust a blue tooth or cellphone near my kids head so I'd rather deal with the cord issues.