Elmo Cake Anyone?

Well the highlight of today, so far, was heading over to Michael's for an ELMO cake pan. Camden is turning 2 in a few weeks...I cannot believe it! So I have taken on the task of trying to make the cake rather than ordering one and paying through the roof. I have never decorated a cake before, not of this magnitude! It should be interesting! Anyone have suggestions or tips? I am going online this afternoon to see if I can find some ideas!