Optimus Prime

I was asked to do a Transformers cake. The boys favorite is Optimus Prime... well... I wish I could have done a cake that transforms, but that just won't happen. :) So, I decided to do the tractor trailer version of 'him'. I think he turned out pretty good. He's vanilla pound cake with vanilla buttercream. Everything is cake except for the two 'tubes' on the side of the cab (exhaust pipes???)They're cookie sticks covered in buttercream. The wheels are pure'd cake mix with black buttercream and molded into tires.