I made James a Modern Warfare 2 cake for his birthday, as much as it pained me. Just kidding, it was kind of fun, they were just the ugliest icing colors I have ever mixed. I did replicas of some of his favorite guns from the game on the side, which I was the most proud of and kept asking James if they look like the real thing. It was all done with buttercream, if I knew how to do fondant it might have looked better or been easier, I don't really know.
P.S. It was a confetti cake mix with the confetti canned frosting for filling.