One of 
my IMPACT volunteers sent me information about a cool website called RedKid.Net. The website says this about itself: RedKid is dedicated to providing a free, entertaining, educational, and safe website for internet users of all ages.
As you peruse the site, you see there are many different pages and features.
The coolest (in my humble opinion) is the Sign Generator. The site contains a variety of images that you can personalize with your message. Some images allow more text than other, but they allow you to be somewhat creative. You add your text and then can download the result. Here are two we have created so far.
For Our Junior High Campout
For the promotion of our Small Groups
Thoughts from a Hoosier Fan in the Buckeye Land 
On http://www.signgenerator.org you can find more sign gens.