Mine was to go into a Nursing Home once a week and feed an elderly woman her lunch. Basically, her daughter couldn't get there as often as she wanted and wanted her Mother to get some extra social time. It was a nice thing to do and was a great summer job for a 13 year old.
I also worked in a boarding kennel and a pet store for 3 1/2 years. Those were fun times.
Working for my mother in the law office where she was a paralegal.
I did basic filing, typing, etc. over summers, but had the hardest time, because at that age, I was in my "I want to be the first female supreme court justice" stage, and would READ everything as I filed it. Not exactly ethical, but who was I gonna tell??