Here's a few fun math websites for games and skill practice:

http://www.syvum.com/teasers/ - Brain Teasers and Puzzles

http://www.mn-stem.com/  - Math Information

https://www.everydaymathonline.com/ - Everyday Math Online Games

http://illuminations.nctm.org/ActivityDetail.aspx?ID=73 - Illumination Math Games