This is the hands down BEST Science Fair Website I have ever seen. Doing a Science Fair Project is made simple, clear and easy. It's searchable by interest/science area/age & grade level/time limits/cost. There are places to ask questions of REAL scientists and blog with other science fair participants. The hyperlinks are GREAT places to find the research you need to explore a topic before embarking on it.

www.sciencebuddies.org/

nces.ed.gov/nceskids/createAgraph/default.aspx

BrainPop: Matter (free 1 week trial of this site available; many free items)

BBC Website: Changing States of Matter

Phet Simulations Activities

Learning Science Website on Force and Motion

www.factmonster.com/

www.solarsystemscope.com/

www.buildyourwildself.com/

www.iknowthat.com/mhscience/Earthquakes/Fixed.htm

www.mywonderfulworld.org/toolsforadventure/games/adventure.html

bensguide.gpo.gov/3-5/index.html

teacher.scholastic.com/scholasticnews/indepth/election2008.htm

classroom.jc-schools.net/basic/ssmaps.html

gotexas.about.com/od/culturalheritagefestivals/tp/CulturalFests.htm