Maps Quizes http://www.maps101.com
White House for kids http://www.whitehouse.gov/kids/
Bens guide to government http://bensguide.gpo.gov/3-5/index.html
House of Representatives: Kids in the House http://clerkkids.house.gov/
50 States http://www.50states.com/
Louisiana Pass http://www.louisianapass.org
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/