Bill Nye:  http://www.nyelabs.com/core.html

Science Bob: http://www.sciencebob.com/

How stuff works: http://www.howstuffworks.com/

Gravity games:  http://www.bigideafun.com/penguins/arcade/doom_funnel/default.htm

Science games  http://education.jlab.org/indexpages/elementgames.html

Museum of Science Boston  http://www.mos.org/

Exploratorium (famous hands-on science museum in San Francisco)

• Science at home  http://www.exploratorium.edu/science_explorer/index.html  
• Sports Science  http://www.exploratorium.edu/sports/

Gamequarium  http://www.gamequarium.com/science.htm

Kids Mysteries http://kids.mysterynet.com/

Yucky body stuff  http://yucky.kids.discovery.com/noflash/body/index.html

Sites for grown-ups ask your parents if you need help

Scientific American

• Ask the Experts  http://www.sciam.com/askexpert_directory.cfm

TED (Technology, Entertainment, Design) ideas worth spreading

• TED   http://www.ted.org

Why files  http://whyfiles.org/welcome/ 

High Energy Physics (atom  smashers)  largest  scientific  instruments

• The Large  Hadron  Collider
• International  Linear  Collider