Sciencebob.com has science fair ideas (for kids and teachers), experiments to try, and video clips of Science Bob conducting different demonstrations and experiments. There is also a Research Help page with links to a variety of science resources.
You can follow Science Bob on Twitter HERE- seems like another good person to add to your science education PLN.
Applications for Science Teachers: Any K-8 science teacher can use this site as another support for Science Fairs plus the experiments and video clips are a good source of demonstration ideas. The Research Help page has links to support many areas in science.