* walking to the local convenience store
* roaming the woods
* playing paintball in the woods
* building forts
* playing manhunt
* going on _long_ bike rides
* paddling out on a canoe in our neighborhood's lake
* staying up stupid late, playing video games with friends
all in a single room together, also eating pizza
We also didn't go _into_ other people's properties, in general. We went into this weird county-owned forest thing, or walked the streets on sidewalks in our suburbs (and ran across 6 lanes of traffic to get to the other side of the street for the store)I get that people want to have their ideals here, but there's a whole "risk to the property owner" side to this conversation that's not happening.
I refuse to take liability and/or responsibility for people on my property that are there without my permission. If I find someone on my property who is there without permission I have a full lawful right to ask them to leave immediately as they are TRESPASSING.
YOUR children are not MY responsibility.
Ninja edit: but in my anecdotal experience there are a ton of parents that don't do this and are shocked/insulted when you ask them politely to keep their kids off of your private property.