Having made it through Cryptonomicon, I am pretty interested in this paper version of the famous Enigma machine. Soon you may see encrypted posts on the site 
Papercraft Enigma machine to assemble at home – Cory Doctorow: The Nazis went to great lengths to encipher their secret messages, building mechanical scramblers. The most famous of these was the Enigma machine, which was secretly cracked by Alan Turing and his team of Bletchley Park codebreakers. Here is a functional papercraft Enigma Machine to print, fold and assemble. Link (Thanks, Zed!)
(Via Boing Boing)
