Way too much!! Kids need rules and boundaries and a good balance, too much of one thing is too much! All things in moderation! There are other things more important in life then spending all their time on the phone, internet, texting, videos etc. Relationships with parents, siblings, grand parents, and doing things with them are more important than sitting at a screen all day and night, kids should be having other responsibilities as well even work responsibilities odd jobs etc, things to do to help mom and dad, even a neighbor.Kids are allowed to be too much in their own world when its healthier to get involved with others and their needs, too much time doing one thing only encourages antisocial behaviour and a self centerdness balance is the key!! For a well rounded life!...Genaveve