Nowadays, someone would have my parents arrested for abandoning their child.
And you didn't put a bike lock on it because no one would steal it.
After that I never so much as took a pencil laying on the floor at school.
Did pretty much all of that as a kid.
My kids did too, except for the staying out all day. (I would even go down to the suburban creek about two miles from our house and have an overnight camp - by myself. I suppose that would have been around 6th grade!
When I was almost 16 I spent two weeks in the Tetons hiking by myself - with my parents approval. (Although mom DID get mad when she got a call from the sheriff as I had been picked up for hitch-hiking and they were calling to make sure I wasn't a runaway). I had promised not to hitchhike. Oh well.