I don't have kids...but I remember as a kid in the 80's/90's I always liked nursery rhymes I had 3 tapes of them which I played over and over till they broke. As an adult when first getting into folk music (2008) and learning to play by ear an instrument I started with nursery rhymes (even found they'd released my fave nursery rhyme tape on CD and bought it.)
I also listened to the the Beatles and Madness a lot as a child (my mum's record collection stopped at about the time I was born and being poor didn't have money to go buying music)...as a teenager it was definately pop (Spice girls, sclub7, Steps etc.) then emocore (evenessence, AFI etc.) and now I like folk.