Great science info for kids and science experiments http://www.sciencebob.com
NASA's web site for kids http://kids.earth.nasa.gov
Science Experiments for Kids http://www.fatlion.com/science
Exploratorium http://www.exploratorium.edu/snacks/snackintro.html
Science Made Simple http://www.sciencemadesimple.com/projects.html
Try Science- Experiments http://www.tryscience.org/experiments/experiments_home.html
The Science Explorer http://www.exploratorium.edu/science_explorer/index.html
The Science Club http://www.scienceclub.org/
Science Fun! Lots of experiments! http://scifun.chem.wisc.edu/HOMEEXPTS/HOMEEXPTS.HTML
Everything You Ever Needed to Know About Creating a Science Fair Project http://www.ipl.org/youth/projectguide/
CAGIS: Experiments and Engineering Activities- from the Canadian Association for Girls in Science ...go to the 'links' link and find even MORE places to look for experiments!! http://publish.uwo.ca/~cagis/experiments/expermnt.htm
Ian Reed's Science Wizards: more great ideas! http://sci_wiz.tripod.com/