Computer and childrens.

This attention needing for parents to the children's, as in enter and in out of Internet, and Internet is a risk for moral and physical health for your children.
As against risk you must to do:
As with provider limit theirs access to the websites of a different themes.
As check for which plays she interesting,avoid to play in wars, as with rape scenes,kill, and attacks.
And he is not listen you,try to explain,that play is an individual world, not a your worlds, and not transfer theirs on your life.
Try to add plays are on the logic and study.
As involve children in the family life, as his habit in net will must benefit for an other, as for example to find address with low prices from markets or download family movie.
Add limiting or explaining,that stay in Internet just two hours in a day.
Explain his,that if will listen you and to do home work ,thus he will get these two hours.