Stuff that would never happen today. When I was 13 my dad hired me to work in back of his electrical company during the summer break. Loading trucks in the morning, sorting and organizing parts in the warehouse all day, sweeping, cleaning, unloading trucks when they came back in the afternoon. 40 hours a week from the Monday after school ended until the Friday before school started.
Within a few weeks I was being sent out as a helper on job sites - carrying wire, nailing up electrical boxes, cleaning up the job site, etc.
When the summer of 14 years old rolled around, I was doing full journeyman stuff - pulling wire, tying in outlets, hanging recessed cans, installing plugs and switches.
I did that for the next 5 years. Taught me some great skills, but there's no way that could happen today. Inspectors would have shut the site down and fined my dad and the builders plenty.