I was 3 and my brother was 2. My parents moved to the states before us and we lived without our grandma for a little while. We stayed in her apartment completely alone while she and my grandpa ran a store across the street. That is pretty crazy, but maybe no choice at the time.

I was definitely allowed to play in front of our house with my brother when I was 5 and he was 4 completely unsupervised, as were all the neighborhood kids.

What about you?