I did as well, I can remember babysitting once as a 14 year old and was determined not fit lol, never was asked again. I did the best I could.Before 14, I did some pet sitting odd jobs for neighbors. But there was nothing like working for a stranger and getting a paycheck, well, actually cash for the first few months (don't tell anyone.) After this proof period, I was made official.
As mentioned above, this was my age of a big break. It was a crap job, but the one I learned the most from. And, the owner and bosses moved me up into the office later. I hope other kids are getting this kind of break today.
Also delivered papers for 2 years from 14 to 15. It's odd I don't think SSI ever reported that measly income though.