The cake is my Lemon Almond Awesome Cake with a chocolate mousse filling. The bottom tier is a 16 inch square double layer cake. The Tank is a triple layer carved cake.
All of the cake is covered in fondant and buttercream frosting. The number 1 and bananas are made of gumpaste and the barrel of the tank is a large straw. I made the monkey out of modeling chocolate (think: Tootsie Roll) with gumpaste decorations.