Fun Brain http://www.funbrain.com/
National Geographic http://www.nationalgeographic.com/kids/
Games http://thinks.com/games/
Kids Domain http://www.kidsdomain.com/games/brain.html
Games! Games! Games! http://www.niehs.nih.gov/kids/games.htm
Squiggles Playhouse http://www.squiglysplayhouse.com/Games/index.html
Yahooligans http://yahooligans.yahoo.com/content/games
Gamequarium http://www.gamequarium.com/
Misc. http://www.internet4classrooms.com