Fun School http://www.funschool.com
Fun Brain http://www.funbrain.com
Crayola http://www.crayola.com
Scholastic for Kids http://www.scholastic.com/kids/
A Plus Math http://www.aplusmath.com
Learn About All 50 States http://www.netstate.com/
Parts of Speech Practice http://www.eduplace.com/tales/