I imagine that if a lot of kids were asked about Jazz, their response would be "What's a Jazz?".
My friends' 15 year-old daughter walked into the room several times while he was listening to some of his favorite music. He plays keyboards and several other instruments, so his interests in music are widely varied, through many decades. She would listen for a while, then go back to whatever she had been doing. Most of what he was listening to was from the mid-'60s through the mid-'70s and some of it was popular, but it really wouldn't be called 'pop music'. Some of it was pretty obscure, but has maintained a loyal following. At one point, she asked if the music was representative of that time and he said it was. She turned around and said, "God, my generation sucks!". She sometimes has a hard time making friends because she just doesn't follow the trends and would rather debate & discuss things than gossip, decide for herself that something is good or bad and she occasionally says things that don't make the other person happy when she hears them spouting BS, including her teachers. His 17 year old son listens mostly to traditional Jazz- plays mostly keyboards & percussion, but also guitar and possibly bass. Playing came from both parents playing, but the interest in Jazz came on his own. He had a recital last night.