“Think about your own 10 best memories of childhood, and chances are most of them involve free play outdoors. How many of them took place with a grown-up around? I remember that when the grown-ups came over, we stopped playing and waited for them to go away. But moms nowadays never go away.” From the NYT Magazine: “A Silicon Valley dad decided to test his theories about parenting by turning his yard into a playground where children can take physical risks without supervision. Not all of his neighbors were thrilled.”