I'm genuinely unsure about this one.
We have a desktop Pc that is used predominantly for my husbands business - the boys (7 + 4) do have a special log in for it that only allows them to access films and games, but as it's usually hidden by stacks of paperwork it's not very accessible.
I have my own laptop that is strictly not for kids, DH has an iPad, strictly not for kids, and they have a nexus tablet each that is set on a special app that only allows access to specific apps that I preset (only educational).
However, DS now has his own room with a desk and I have thought about getting him something that he can surf the internet and send emails to his Dad. Not Facebook, and strict parental controls. He's fascinated by facts and is always asking me to 'google' this or that. He's recently discovered the thrills of Wikipedia! His room his covered in encyclopaedias and fact books and I really think he would benefit by having direct access to the internet.
But.... he's 7