With the internet having virtually no controling factors to it, you may be concerned about what your kids are accessing on the web.  Hey, lets face it, the web is full of pornography and hate literature.  You can't fight it, but maybe you can control it in your own home.  The following sites will give you some very good cyber sitters.  These are programs you can download and install on your syste, to control what your children are viewing.  They don't cut them off from everything, just what you want them to see.  A Piece Of Advice:  Don't get your kids to install the program for you.  I know it sounds stupid, but people do it and then wonder why it doesn't work.  First off, you need to make up a password for it.  This allows you to turn it on and off.  The one who installs it usually makes up the password.  Are you starting to get my drift.  Install it yourself. It's not that hard.