Websites for kids...
http://www.sciencekids.co.nz
http://kids.discovery.com
http://www.sciencekids.co.nz/gamesactivities.html
http://kids.usa.gov/social-studies/
http://interactivesites.weebly.com/social-studies.html
http://www.learninggamesforkids.com/social_studies_games.html
