Please look at the websites below for guidance on setting up parental controls on games consoles, PCs and Tablets.
http://support.apple.com/kb/ht4213- setting up parental controls on Apple IPAD/IPOD/IPHONE.
http://www.microsoft.com/en-gb/security/family-safety/childsafety-steps.aspx - Guidance on setting up parental controls on Microsoft devices. (PCs and Xbox)
https://support.us.playstation.com/app/answers/detail/a_id/5097/~/ps4-parental-controls Guidance on setting on parental controls on the Playstation 4.
http://www.nintendo.com/consumer/info/en_na/parents.jsp Parental Controls and Guidance from Nintendo.