I Know that! http://www.Iknowthat.com
National Geographic for Kids http://www.nationalgeographic.com/kids/
Time For Kids http://www.timeforkids.com
Jan Brett http://www.janbrett.com
Math Fact Cafe http://www.mathfactcafe.com
Patricia Polacco http://www.patriciapolacco.com/index.htm
Tomi De Paola http://www.tomie.com/