Cool Math For Kids http://www.coolmath4kids.com/
School Express http://schoolexpress.com/index.php
starfall http://www.starfall.com
Kevin Henkes http://www.kevinhenkes.com/
Tomie dePaola http://www.tomie.com/main.html
A Learning Center for Young Astronomers http://starchild.gsfc.nasa.gov/docs/StarChild/
Learn About the Planets! http://kids.nineplanets.org/intro.htm
A-Plus Math http://www.aplusmath.com/
Simple Machines http://edheads.org/activities/simple-machines/
Butterflies http://www.enchantedlearning.com/subjects/butterfly/
Butterflies http://www.poughkeepsiejournal.com/projects/gallery/butterflies/
Addition Challenge http://www.oswego.org/ocsd-web/games/Mathmagician/mathsadd.html
Subtraction Challenge http://www.oswego.org/ocsd-web/games/Mathmagician/mathssub.html