My son is asking for a "busy town truck cake" which essentially means he wants a yellow pickup truck cake. I've looked online at how to make one and I've seen all sorts of recommendations but no real clear instructions. I should say that I have never made anything other than a square, round or rectangular cake before. Any suggestions? So far I'm leaning toward stacking a mini loaf cake on top of a regular sized loaf cake and using Oreos for the wheels.