Tell them what there allowed to do and just pop in now and again and check cookies internet files and chat logs.
Ive got a 10 year old and she has been taught how to respect pcs since she was very young and has had her own 3 years(different ones) she now has a 2 gig skt a machine with 512 meg ram dvd rw and a few harddrives (i steal it sometimes as a test bed)
I just gave her the internet in her room and told her I trust her and as long as she behaves she can keep it.If she doesnt she knows I will simply remove the wireless adapter and she loses the net. She is very good and doesnt install anything unless im there
