My wife and I are expecting twins this spring, and when we heard about Belly Buds we had to give them a try. Every pregnancy book says that they can hear with their little ears, so we wanted to play them some of our favorite tunes. The buds work great! The kiddies definitely respond the the music – moving and shaking! We took them on our Babymoon to the beach and they were a lot of fun for us (and I think them too). I’m a big fan of the feature where you can plug your headphones into the buds so you can listen along and figure out which songs they like the best… Ours seem to enjoy several Beatles songs (who doesn’t) and the album Raising Sand by Alison Krauss and Robert Plant.