Who is "Flat Stanley" and why is he two-dimensional?

Here's a site that has a Flat Stanley picture gallery...he even visits Afghanistan! Here's an explanation of how Flat Stanely works....there may even be a "Flat James" in the works...who know.

Description:
Students make a paper Flat Stanley and mail it, along with a blank journal, to someone on the List of Participants or to a celebrity or politician.  The recipient treats the visiting Stanley as a guest and takes it places.  After a few weeks Stanley is mailed back with a completed journal and perhaps some photographs, post cards, and souvenirs.  You share with your class what Stanley has done, where he has been and plot his travels on a map.  Some classes send out hundreds of Stanleys.Having your class on the list means being prepared to have others send Stanleys to you, too.

Flat Stanley Picture Gallery