I think another problem is that lessons focus on "songs" that children don't like. I bet if a kid saw someone playing their favorite pop song on the piano they'

I think another problem is that lessons focus on "songs" that children don't like. I bet if a kid saw someone playing their favorite pop song on the piano they'd be all over it, specially if it's something like a simple melody they could learn in a day or two. It's just about sparking the interest.