Here's a cake I made for my boyfriend's birthday this past year. We love watching Futurama together and I thought I'd throw him a manly party where he could drink beer, smoke cigars, and play poker. He loved it!
I baked what seemed like a billion little cakes in order to get the height and proportion right. I used rice krispy treats for the structure of the eyes. Rice krispy treats are a great option when sculpting or having something that comes out of a cake because it's so light weight. I did have to use lollipop sticks to keep them in place until it dried (use water to stick anything to fondant). i also used a lollipop stick to keep that cigar in place. If you look close, that antenna is actually a silver candle :)
Here's a photo of the cake once we cut into it: