Where have all the children gone?

Afterreading this http://playborhood.com
I did my own informal watch. I drive to work approximately 25 minutes and on this trip I glanced back and forth when I passed houses. I looked for swingsets. I passed probably 10 or 12. Some I know are there and see all the time some were set further back and yet until I started counting them it never occurred to me that I have NEVER seen one kid on those swingsets.
The drive I take is the same route I have taken for years on and off. I pass beautiful homes with those nice wooden swingsets in the back. Some just have a single swing in a tree for a toddler and with the exception of one birthday party I saw a few years ago which consisted of a moon walk I never see the kids outside.

I do see them walking in town on their way home from school with back packs in tow. They are in groups heading off the bagel store for an afterschool snack and are probably middle school age and high school.
I see the smaller kids at the park when the weather gets nice and we head to our local park for climbing and sandbox digging but never do I see kids riding their bikes furiously down the street or playing in their front yard.
There is an advertisement in the magazine, "Wondertime" for the children's TV show, Clifford. A little girl is peeking out from a tree and behind her is The Big Red Dog and the caption reads, You could tell her about the big outdoors or let her experience it"
I am reasonably certain that a better way to experience the big outdoors is to actually go out in them and play and not watch cartoon animals doing it for you.
That might just be me though.
I can say however, that I do see 2 kids who play outside whenever it isn't really cold or lightening out.
I let my kids play in the rain in the mud , dig for worms climb trees.
The sad thing is it's just us.