I was thinking the same.
It are those cute emoticons you can use on Twitter or chats.
To enhance your story or to say something you can't say with words.
Here an example on how you can even put entire movie quotes or titles into Emoji.
And if you want to practice a bit.
A very famous book title:
You can find more of these here at Mashable.
As said before, an image can say more than a thousand words. Well, I guess an emoticon can do the same.