This one revolves around ciphers, Rumkin.com offers various cipher tools that you can use to decrypt some of the puzzles.
Baconian Cipher - ABBABABBBABAAABBAABBAABBB
Base 64 or MIME - dGhpcnR5IHRocmVl
Caesarian Shift (9) - cqrach wrwn
Morse Code - ( - .-- --- / .... ..- -. -.. .-. . -.. / - .-- . -. - -.-- / . .. --. .... -)
Keyed Vigenere Cipher (cipher) - Ymha dvtw cprv uqm
ROT 13 - guvegl fvk
Atbash - hvevm sfmwivw mrmvgb vrtsg
As you can see there are many ways to manipulate your message
I hope you have had some fun learning about the different ciphers.