I did this cake for my son's 2nd birthday party. It is 11 x 15, devil's food with chocolate barvarian cream in the middle. It is all buttercream, the mountains are rice krispy treats covered with buttercream, and cinnamon graham crackers for the sand. The signs were printed of the internet, and the cars are store bought. My son loved it, he actually tried to put another car on the road, which messed it up a little, but luckily it was fixable. I got some great ideas from this website for this cake, thanks for looking :)