Steam Roller Cake

The birthday boy asked specifically for a steam roller cake and I used his toy for a model. Half the cake is finished road, and the other half is under construction with the steam roller busy working in the middle. The steam roller is made from rice krispies treats, buttercream, fondant and gumpaste and is completely edible. The cake is decorated with mostly buttercream icing, with fondant used only for the road, rocks, safety cones and the happy birthday sign. The "dirt" is ground up chocolate cookies and brown sugar. The entire cake is edible!