Here are some links to some cool sites that teach coding through gaming. Give  them a try!

Dr. Who: http://www.cbeebies.com/cbbc/?cdrid=tgDyGp19OX

Code Combat: https://codecombat.com

SpaceChem: http://www.zachtronics.com/spacechem/ (free demo, $10 on Steam)

Codemancer: http://codemancergame.com/ (coming August 2015)

Machineers: http://www.machineers.com/download (free demo)