People don't change that much. If they were interested in computers/music at age 8, then they would probably be interested in computers/music at age 80.
My computer experience going into high school was playing commander keen on a 486.
I went to college to get a diploma in computer animation.
I am now a web programmer.
People change.
Still working on computers though.
my point is that I've gone from knowing almost nothing about computers to being a programmer since I started high school. If I had learned about what I wanted to learn at 8 years old, I'd be digging up dinosaur bones in Alberta.
I think it'd be interesting to see how far they'd get if they developed a sense of curiosity. They might end up being really specialized (like say only studying dance), or they might end up discovering that everything's rather interconnected and end up being generalists.