Free online learning games for kids

Here is a few websites that I found to help our children learn and for FREE. 

http://www.roomrecess.com/

You can use ABC mouse for 1 month trial it only cost 1 cent.  This is a great site my children love it and they learn a lot.  If you don't want to make a monthly payment them simply cancel before your trial ends.
http://www.abcmouse.com

This next one you can actually create your own games or you can play what they have.
http://www.purposegames.com/

My kids also like Nick jr. games they have a lot of great stuff on their site.
http://nickjr.com