Handing out favors and programs are great ideas, a couple other idea's are parking attendants(if you feel they are old enough) and one of them could be in charge of guests coats, wraps etc....this would depend some on the weather. You have gift attendants, if they are primarily staying at the gift table?...maybe one of the boys could greet people and take the gifts at the door, so the guests don't have to worry about what to do with the gift. Also, any young boys might not feel honored with this, but helping people to their tables, carrying drinks for guests etc. could be an option.