Props Gathering and Running
If you frequent yard sales and flea markets, and enjoy a great scavenger hunt, then try Props Gathering. Many items need to be collected for any given show (items that an actor brings onstage are called "props"). This position is great for someone who perhaps can't commit to being available during the actual run of a show, but would like to help out in their free time.
Props Runners are the people who work the performances of the show, getting items ready to go onstage and making sure everything is ready to go at the start of the show. Shows often require a few runners each night, and volunteers can sign on to do as many as they are able.