Parental controls for your PC

As parents, we are continually concerned about what our kids are doing while surfing the internet.
I am a Foster parent and I have the same concerns as other parents. I have discovered what I feel is the perfect solution to this concern. Check out K9 Web Protection on the Internet. This is what I use. I know that when the kids are on, they are not on where they are not suppose to be. This is a free service for home PC users. There may be other upgrades available. I haven’t checked that out since the version I am using is just fine for our needs.
I do highly recommend this website. When in use, if the kids or you attempt to access a restricted site, a message will appear instead of the website. You need to enter a password in order to view the website.
I want to point out that I have been looking for something like this for quite a while and I finally found something that is definitely worth it.