Two teens organized a concours car show for charity, have raised hundred thou in 3 years

http://www.nytimes.com/2007/06/10/automobiles/collectibles/10SCARSDALE.html?pagewanted=2&ei=5070&en=dbd3c0fb39594339&ex=1182830400

Two high schoolers in Scarsdale NY decided to negate the bad publicity that local teens were generating from underage drinking (etc) and eventually got the city council to shut down the city square for a car show to raise funds for the United Way, a family pediatric liver foundation and Habitat for Humanity.

Now it's in it's 3rd year... cool.