Indestructable computer for senior citizens?

If you are one of the IT guys hanging around the church, you are constantly being asked to fix senior citizen computers. Other senior citizens don't have computers just because of the problems.

The way to fix this is to come up with a Linux boot CD which only allows surfing with Iceweasel and thus email with gmail. Catch my drift? Boot with a CD and they don't even need a hard drive. Update and virus won't even be in their vocabulary. Then, if they have a problem, you can tell them to pull the plug out of the wall...

Creating the CD is the problem. I don't have the time. Does someone out there have the time to solve this problem?

I plan on putting this into the forum once I get it up.