I worked and managed a food pantry when my oldest was little (we served a weekly dinner as well). He helped by standing on the food line and offering "Would you 'wike' a bag?" He was four at the time....
Now we buy wrapping supplies and gift cards to the local family shelter. We shop and deliver to the home. They like this better as now they have the families do their own shopping giving them more of a feeling of power and confidence.
The food pantry or dinner is a fun way to spend time...Some I know have done if for decades. I did enjoy it, but week after week it became too much especially as more children joined our family..
Jodi, if you want to make this a regular thing, the off times of year are the hardest for such places. EVERYONE wants to work at the holidays, but March, July, August etc. are tough...Maybe you could mark your calendar?