I like this idea:
"So: Just as we have “wildlife preserves,” where those in power guarantee that something ancient and precious will not be destroyed, we also need to guarantee kids a “child-life preserve.” That is, guarantee a time and place when children, no less than gazelles and hippos, can play as — dare we say it? — nature intended. Because when you’re playing, you’re developing all the skills (compromise, communication, “reading” people, getting buy-in, empathy, creativity) that you need to become a successful human. A less-likely-to-be-lonely human.
And the byproduct of all that playing is…fun. Fun arises from playing."


Let Grow
The Problem with Playing
The problem with free play is that it's the best way for kids to make friends, but it lacks a marketing budget.