Math Games
http://www.funbrain.com/
http://www.coolmath4kids.com/
http://www.aplusmath.com/
http://www.gamequarium.com/math.htm
Puzzles and Trivia
http://www.funtrivia.com/quizzes/for_children/topics_for_kids/mixed_trivia_for_kids.html
http://www.timeforkids.com/TFK/games/white/0,9970,96321,00.html
Cool Sites
http://familygames.com/