The fun in this code is that it looks like you are writing in a different language! It's also easy to translate. It looks like this:
ROT13 Table by Bdesham from wikipedia.com. Public Domain
This code is similar to the Caesar Cipher.
This code is a bit more complex than the others. It is nice, and it looks cool, but it is common enough to be able to communicate, and simple enough to explain on the fly. It can be typed or handwritten, which is good, and it only uses the alphabet, which is good. It is sure to baffle anyone who tries to read it.
Practice it here!