12-15 worked for my mom and her business she started up
14-16 mowed neighbors lawns for ~$15/yard
15 cleaned out horse stalls where my mom boarded her horse. Only stayed a month or so because it was so underpaying (like $20 for 6 hours of work)
17 worked at Geauga Lake Amusement park the year Cedar Fair bought it as a ride op on X-Flight (now Firehawk at King's Island), then was assistant team lead at Thunderhawk (the old Serial Thriller)
18 CVS as basically a do everything person (usually did photo lab, stock/floor work, and some pharmacy work)