While on this subject, my parents wanted to invest a small amount in Bitcoins as a long term "just in case" they ever become worth a lot someday play. I went to another one of my favorite sites, bitaddress.org, generated a paper wallet for them, bought the number of Bitcoins they wanted using my Mt. Gox account and then sent the Bitcoins to the public address of their paper wallet.
I then handed them the paper wallet in an envelope and they plan to put the paper wallet in their safe. If they want to buy more in the future they can just call me and I can add more to their account.
My parents are not that computer literate and don't know the first thing about public/private keys but they do understand the concept of a "numbered account" and they are happy to have something physical to put in their safe.
BTW I also gave them a few physical Bitcoins to play with and show their friends!