Text messages "emojis" are no longer accessable.

[AC Question]

I got my Galaxy 5 and a couple weeks ago I discovered when text messaging if I touched the "happy face" the "keyboard" would drop down and I was able to choose from a bunch of emojis, happy faces, cats, people, etc... Now I can't. I touch the happy face, but nothing happens... Where did they go or what can I do to get them back? Thank you.