Unfortunately, there's no one single product, hardware or software, that can do it all. Every one has some good features and some glaring omissions, and a lot of inappropriate things pop up in the most inconspicuous ways.
Since you're giving her a Mac, here's an excellent link to set up a "Children's Account" and how to monitor it. Using this, you can set her an account and monitor what she's doing, and adjust for things she shouldn't be looking at, or programs she shouldn't be using.
http://gigaom.com/apple/kid-proofing...ntal-controls/