(Sample link) White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
Practice with math facts http://www.mathfactcafe.com
Explore life in colonial times http://www.history.org/kids/
Create your own puzzles http://www.puzzlemaker.com
Practice your math facts http://www.aplusmath.com