Sites to help you choose your topic:

www.stemnet.nf.ca/~jbarron/scifair.html

www.halcyon.com/sciclub/cgi-pvt/scifair/guestbook.html

http://www.isd77.k12.mn.us/resources/cf/ideas.html

http://school.discovery.com/sciencefaircentral/

http://www.scifair.org/

http://www.stemnet.nf.ca/sciencefairs/senior.html

www.usc.edu/CMSI/CalifSF

http://www.stemnet.nf.ca/sciencefairs/intermed.html

www.sasked.gov.sk.ca/docs/xsci/tpcd3xsc.html

www.isd77.k12.mn.us/resources/cf/ideas.html