You could also try service clubs such as Optimists, Rotary or whatever you have in your area. Optimists has a focus on youth. We've had a great relationship with them for a few years now. A partnership is better than a sponsorship. We're planning to help them with their annual Christmas tree sale this year. It will help them and help us become better-known in the community. This past summer we started a relationship with Rotary by participating in their Rib-fest. Have a look as well at our FIRST Community program at
http://1334.ca/first-community-challenge.