We all did!, play out, it was normal back then, no helicopter parenting, no being driven all over the place. We, my brother and I and a girl who lived nearby walked to school from a very early age. I grew up in Surrey, close to a common, beyond my back fence was a pond and a stream which local children played around, beyond that a pub and a cricket pitch leading into woods. We played in the street, we played on the common, and in the woods around numerous ponds inhabited by fascinating pond life such as newts. Weekends we went to Saturday morning cinema which we walked into town for, returning home for the afternoon. Friday evenings I went to Brownies and came home on my own, maybe a twenty minute walk. My town was famous for what was known then as a multitude of mental hospitals, or asylums since their closure, none remain, they've been turned into housing estates. Back then quite a few inmates came out and about at the week-ends, they weren't a danger, they'd suffered traumatic events in their lives, such as shell shock, unfortunately the homes were generally known as loony bins because no one really explained what had happened to those people, as children we just knew that they weren't as they should be, but we didn't fear them, they weren't the strangers who could have presented a danger, damaged but harmless. There was far more a warning to be careful on the day people from home and abroad descended on our town for a world famous racing event, attended by The Queen and usually we got the day off school for that.
I think most children had an innate nous about not accepting sweets from strangers or going off with anyone we didn't know, we'd had our warnings, but of course there was the occasional tragedy. I remember the freedom though and know that my experiences of growing up have been very different from both children and grandchildren.