Which computer monitoring software should I use to monitor kids' computer?

you should never leave a child alone with an internet connection.

it is like leaving them in a dark alley in New York. even if you can see what they have accessed, by then, they have already accessed it.

if you are a parent, you should be monitoring everything they do. if you don't have that kind of time, then don't be a parent...

Get really slow internet and you won't have to monitor the kids. get the slowest speed internet you can possibly purchase faster than dial-up like one meg per min for the kids it's good enough for doing powerpoints and for doing homework but it will keep your kids from sitting on that computer all day and all night chatting and playing online games when they should be interacting with real people. If it takes 5 minutes to get something done your kids won't be sitting there spending all day long on the internet. Forget the monitoring software get slow slow internet.

For monitoring kids' computer activity, I recommend you to use EMPMonitor Software, which is real-time tracking & monitoring software that maintains a record of every single minute activity.