Your dad and I have commented about how much hipper you are when it comes to music. When I was a kid, I liked some really dorky stuff. You like "rock and roll" as you say, and this includes Led Zeppelin, The Police and The Presidents of the United States. We have inspired a love of jazz as well; you even have preferences when it comes to jazz -- you like the experimental stuff and Coltrane, to start with.
Because you don't really watch t.v., we've been able to stay away from the really annoying stuff (The Wiggles and Barney), but you do like Raffi, a children's standard since the 80s. It's actually pretty tolerable. One of your favorites is Dan Zane, and he definitely rocks. You love The Beatles -- especially (predictably) "Lucy in the sky with diamonds." I've downloaded and checked out as much cool music for you and you've been receptive; once in awhile you surprise me by asking for something I'd choose if I was hanging out alone.
In my iTunes library, I have 3 or 4 renditions of a few favorites like, If you're happy and you know it, The itsy, bitsy spider, Wheels on the bus, This old man and Old MacDonald. I've got two "jazz for kids" albums which are well-executed and not cheesy.
I think your music tastes reflect your tendency toward sweetness and I'm happy to play Woody Guthrie singing Bling Blang 10 or 20 times, if that's what keeps you dancing.