As part of this festival, you can barter three leaves for two cookies (Extra Delicious Tasty Biscuits), and each cookie you eat gives you a fortune inside. Collecting all 50 of the numbered fortunes nets you five titles:
1-10: Same Old Song
11-20: the Peculiar
21-30: Writing on the Wall
31-40: the Enlightened
41-50: the Poetical
Not only are these fortunes fun to read, but they can be traded. When you give a fortune to someone else, it progresses their deed. Give them all 10, and you've just shared a title!