Help-Anyone heard of this?

[john]

A while ago I heard of an empty present idea to give someone. It is where you wrap nothing and give it to them along with a caring/sweet message. It tells them not to open the gift, it is a symbol that someone cares for you. They are to leave it on a shelf and when they are feeling down, they are to pull it out and it is to remind them that you care. It is a nicely written message, I cannot remember it. Anyone heard of this? Can you find, get the message for me? I want to give one to my gf as one of my gifts for xmas. Worse case senario, I will have to sit down and write one.