Do-It-Yourself Electronic Enigma Machine
Radio Shack Robot writes "The Enigma-E is a DIY Building Kit that enables you to build your own electronic variant of the famous Enigma coding machine that was used by the German army during WWII. It works just like a real Enigma and is compatible with an M3 and M4 Enigma as well as the standard Service Machines. A message encrypted on, say, a real Enigma M4 can be read on the Enigma-E and vice versa."
You could encode a secret message on this machine and then send it to a friend with a notice telling them to buy a machine too!
Seriously, beyond some amount of coolness (much less because it's an electronic version as opposed to a mechanical one) this doesn't have much use.
EVERYDAY IS CATURDAY
Too bad this isn't available in the US. It would make a really nice gift (To me).
Buckethead