LOL.....my KIDS playlist would be from the 90's. My playlist would be from the 60's and 70's and my kids were forced to listen to it and they LOVE the Beatles. Rolling Stones, Monkees, Dave Clark 5....etc.
My 4 year old Granddaughter's playlist is from from the timeless Disney library. Anything from Finding Nemo, and she HAS to hear the theme from the Enchanted Tiki Room every morning in the car on the way to school.