I live in Colorado, we have a "free-range" law that protects parents allowing their children to play outside unattended. It's a bit sad that such a law needs to exist, but I'm glad we have it here.
In our neighborhood it's very common to see kids (including mine!) outside doing things by themselves. We bike with our oldest son to school (he's 7), but plenty of other parents let their kids bike to school on their own. I think it helps that we live in a city with good pedestrian infrastructure and lots of green spaces. The whole city is better for it and I wish more US cities would do the same. My sister's neighborhood in a different state feels like a very fancy prison, nice homes, but you can't even go to a park without getting in a car.
In our neighborhood it's very common to see kids (including mine!) outside doing things by themselves. We bike with our oldest son to school (he's 7), but plenty of other parents let their kids bike to school on their own. I think it helps that we live in a city with good pedestrian infrastructure and lots of green spaces. The whole city is better for it and I wish more US cities would do the same. My sister's neighborhood in a different state feels like a very fancy prison, nice homes, but you can't even go to a park without getting in a car.