You are using the very media you want your kids to stay away from to complain!
The computer is everywhere, and used for everthing!
In days of yore, you could get things done without one, but in the real world of today you will not be competitive or skilled for anything other than a labor! How many time have you heard this "The system is down, so we can not process your request at this time!"
If you want this for your children thats fine with me. But I will not allow my childrens future to suffer.
My 2yr old can mouse about and play basic games, were as my 6yr old can brouse the internet, install basic games and programs. Of course it is your job as a parent to police or supervise what they view online.