Granny Linux

Bryce talk about Granny Linux listing as requirements:

First, the interface should be extremely stripped down. Granny Linux users are the polar opposite of the traditional Linux user - choice is bad. They probably only use about 4-6 applications, so there should be no other options beyond those, plus a button to turn off the computer, and a magnifying glass button. Firefox, one or two apps from Open Office, and a couple games. That's it.

Well, judging after the screenshots (I had not used it), Symphony OS look like fitting the bill.