I am seeing less and less kids wear helmets. Previously, it was more kids in poorer communities. Now I see them (usually ages 10-13) everywhere.
The police dept. gave out free helmets to the kids at my school (grades 6-7) a couple of years ago. I found several just lying on the ground in the parking lot! None of my students wore helmets, unless they had a parent who was a cyclist.
I always compliment kids on their "cool" helmets when I see them wearing one.
Don't get me started on the parents who don't wear one when they are riding with their kids who do.