Here are some interesting websites about music and music education:
How Music Education Benefits the Brain:
http://news.usc.edu/102681/childrens-brains-develop-faster-with-music-training/
http://www.vh1savethemusic.org/why-music/benefits-to-the-brain
http://www.wnyc.org/story/we-all-hear-differently-heres-proof/
http://www.childrensmusicworkshop.com/advocacy/12benefits1/
http://www.pbs.org/parents/education/music-arts/the-benefits-of-music-education/
https://www.dosomething.org/facts/11-facts-about-music-education
Games:
https://musiclab.chromeexperiments.com/
http://pbskids.org/cyberchase/math-games/cyber-pattern-player/
http://www.classicsforkids.com/games/notename/notename.html
http://artsedge.kennedy-center.org/interactives/steprightup/whackanote/