Here's another site to help you with your Science Fair Project, courtesy of Mr. Keenan. It has a "Topic Selection Wizard" that attempts to match you with an area of science that will most interest you. It also has a step-by-step guide on "How to do a Science Fair Project." You can also post a question on the site's "Ask an Expert" page. Located at http://www.sciencebuddies.org/
Don't forget to look at these past posts for other science fair web sites:
here and here.