1.
http://www.ixl.com/

2.

http://pbskids.org/games/

3.

http://freerice.com/

4
http://www.preschoollearningonline.com/

5
http://www.superkids.com/aweb/tools/words/

6.
http://www.lumosity.com

7.
http://kindersay.com/

8.