Kids' Place http://www.eduplace.com/kids/index.html
PBS KIDS http://pbskids.org/
The Electronic Zoo http://netvet.wustl.edu/e-zoo.htm
Family Education Kids http://fekids.com/kln/
Kididdles http://www.kididdles.com/
For Catholic Kids http://cathkids.ainglkiss.com/
Cool Science for Curious Kids http://www.hhmi.org/coolscience/index.html