sitting in the back seat with my daughter and the song Glycerine by Bush (if you haven't heard them before, I hope youll go check it out, it's a beautiful song and amazing band! he came out with great stuff! Sound of Winter is a recent popular one too) and I look over and she's getting sleepy-eyed just as the song is ending, so I whispered to SO "play it again".... sure enough, it put her to sleep!.... then again, she also fell asleep to Bone Thugz in Harmony the other day lol. I think she just likes mom and dad's music.