Rolling cigarettes
My parents divorced when I was 5 years old and once a month I would go to my dads for the weekend. He lived in a mobile home park and let me run around pretty much without rules except don't bring the cops to his door. I remember being 6 years old sitting at the table in the kitchen being put to work rolling cigarettes. He showed me how to work the machine and everything. I was probably the only kid at school who knew how to do that or open a beer using the door jam.