Charles Bronson (Buchinsky) worked in coal mines starting at age 12 until he went into the service 10 years later. He was paid $1 per ton ($24 at today's value.) My older brother worked in a NABISCO factory for a year or two, but that was as an adult in the 70s. I interviewed there, but dislike the boredom of menial labor almost as much as I dislike unions. I know we got some farm kids here.
My Aunt worked at Nabisco in Atlanta across from Fort Macpherson Army Base. She retired there in the 80s, it was very lucrative job, retired very comfortable. I know when we were kids in the early 60s all we needed was a changed paper birth certificate to work in service jobs. I did work in a department store when 13 along with my friend who I still talk to daily. We worked all kinds of restaurant jobs. She ended up retiring at GM Assembly. My brothers worked in construction in early teens. My mother took piano lessons at 6, taught piano by 9, although her parents were well off, so it wasn't for money. It was to learn to play, they did charge for lessons. Many kids worked on farms and paper routes. My younger brother worked on a veggie truck for a farmer.