White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Mastery Club- created by Heather Renz of Redmond, Oregon http://www2.redmond.k12.or.us/mccall/renz/masteryclub.htm
The Stacks for Kids by Scholastic http://www.scholastic.com/kids/stacks/index.asp
Ben's Guide to US Government for Kids http://bensguide.gpo.gov/