The simple answer is : just stand/sit there and watch what they do, IF this is a family computer. If this is the kids' private computer, then either use netnanny or similar to block whatever sites you want to block, and let the kids have their privacy. If you don't want them to chat to strangers, then tell them why they shouldn't do that. To tie in with my view of the entire privacy discussion, it's fairly simple : kids will be kids. Kids WILL do things they where forbidden to do. If they do, you punish them, and they learn from that. If you warn kids of the dangers of the internet, in the same way you warn them never to *insert cliché of choice about dirty or dangerous men here*, most kids will be bright enough to take those warnings seriously. I don't believe watching a kids every move and policing their every action is the answer. Letting them run amok without any supervision isn't good either, so my advice : find a median between those two that works. You can argue that the internet is rife with "sexual predators", but let's be honest, so is the real world. If you raise your kids like a proper parent, giving them privacy when they deserve it, and only taking it away when they are bad, i think you'll find they'll grow up just fine.