National Geographic for Kids http://www.nationalgeographic.com/kids/
Jan Brett's Site http://www.janbrett.com
Fun activities of Dr. Seuss style http://www.seussville.com
White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
Starfall http://www.starfall.com
Money and coin activities-- click on the "US Mint" icon once you get to the website http://www.treas.gov/kids
Rober Munsch http://www.robertmunsch.com/playstory