Name that Tune!

AJ has quite a repertoire of songs to sing lately.  He can "sing" any of the following songs: "Twinkle Twinkle", "Rockabye Baby", "Row Row Row Your Boat", "Baa Baa Black Sheep", "Happy Airpane You (Happy Birthday)", and the "Itsy Bitsy Spider" (to name a few).  My favorite thing about his singing is that all the songs sound alike :)