Let me start by saying that this is not one of my own characters and all credit for the design of them goes to Ran Sieradzki whose work can be viewed here:
http://ranimate.cgsociety.org/gallery/
I did a version of this because my kids saw me browsing through the galleries and they wanted me to do one. It's a simple little character but it can display allot of feeling, I am happy with the way it turned out.