Last week I made an army tank birthday cake. Most of it was done in butter cream with a few fondant details. I made a half batch of marshmallow fondant which made the army guy on the top of the cake, stars, covered the preztel rod gun, and made the tread which went under and over the golden oreo cookie tires. I made the army guy cake topper and the pretzel gun a couple of days before I made and frosted the cakes so as to spread out the work.
I used three cake box mixes; they made a sheet cake and half of a ball cake.