Content filtering on Ubuntu 10.04

<pre><code>I have a laptop that I am running Ubuntu 10.04 on. My wife and I would like to setup some kind of content filtering software on it so that we can keep track of, and limit the kinds of websites our children can visit, etc. Currently I also have a Windows 7 pc running a program called Safe Eyes, which I have found to be wonderful software. Unfortunately, Safe Eyes is not available for Ubuntu. We both really like Ubuntu, but from what I have been able to discover, there isn't any real content filtering software out there for it. Does anyone know of something that will solve this problem. I am fairly new to Linux, but I have a knack for computers, so even if the software is a little bit difficult to configure, I'm game especially if it has decent documentation. </code></pre> <p>Thanks!</p>