Skip a meal once a week (or more frequently) and contribute the cost
savings to global hunger.
Eat a low-cost meatless meal once a week and give away or set aside the
cost savings.
Sell a portion of their garden crop and donate the proceeds. One
congregation does this on a group basis, calling it the "hunger stopper
project."
There are many kinds of events and sales that could be considered to help a
youth group or Sunday school class become involved. A beginning list might
include: a benefit convert or musical event; a marathon athletic event; an
auction; a lawn carnival; a car wash; recycling aluminum cans; sale of a
product.