A program in high school that let me go to work for a electrical contractor 2nd half of my Jr year. I was a electricians helper (gopher/grunt/dirty jobs/etc).
I worked in all 3 of our local plants, Dupont, Sylvania, IP, doing commercial wiring. It was a great experience as it let me see what life was like in a factory setting. Which allowed me to learn at a young age that working in a factory was not my cup of tea, but very thankful for that opportunity.