Note this quote from an 18 year old winner of one the contests sponsored by ASHOKA and Changemakers:
"I found the contest on the Internet and I didn't think it would amount to much, but it turned out really well," said Kyle Freas, 18, of Plano, Texas, president of the Youth Together organization that won April's "That Was Easy" national contest sponsored by Changemakers, which is a project of Ashoka, a non-profit group that supports social entrepreneurs.
Working with a seed grant of $800 from a non-profit organization, Youth Together raised $70,000 by organizing kids to perform community service and raise money for shelters, children's hospitals, animal rescue centers and other causes. Freas' group won a $1,000 grant and a $5,000 shopping spree at Staples."
Turning $800 into $6000 worth of grant money and office supplies and $70,000 for community groups. Pretty good ROI.