So we bought this item called Belly Buds (from Amazon.com because of a 10% discount). I would say this was more of Ron’s idea as he wants to stimulate the baby and hopefully learn to enjoy music. These Belly Buds are speakers that connect to an MP3 player (I’m using a iPod Shuffle) and stick to your belly using silicone gel adhesive.
Ron has loaded a bunch of classical music onto my iPod Shuffle and I’ve been using the Belly Buds about 4-8 hours a day. I can’t wear it all the time because the adhesive is a bit irritating to my skin so I can only tolerate it for about 4 hours at a time before I have to remove them and let my skin rest. Right now I’m not sure if he’s really reacting to it but I’ve only had them for a week so maybe it take some time.