So I'll put music on for the baby and put my boyfriends phone on my tummy so he can listen to it and let it go by frozen came on and boy did he start kicking around like crazy . (:
I don't even use head phones I just place the speaker side of the phone on my belly and he just loves it . I think he is in there just dancing away . (: plus my boyfriend and I listen to loud music all the time so I don't think it would be hurting him to just put the phone there .