Our local food bank - the large distribution center - allows volunteers on the warehouse floor starting at 12 with a parent. We have many smaller food banks that they serve but I'm not sure about their age limits. DS1 and I started going regularly when he turned 12, switched to a year round school and I needed to fill his days while siblings were in school. It's been a great experience. Really helped him to have an established volunteer routine once he joined NJHS and needed hours and didn't need to scramble to find them.
Mom to Two Wild and Crazy Boys and One Sweet Baby Girl