For my son who was obsessed with garbage trucks I made this Garbage Truck Cake. I had a hard time finding any online so I ended up making two pound cakes in bread pans , cut and stacked them. Most are squares or rectangles and I set it up on two rectangles to attach the wheels to.
The other cake I rounded the top and set on top of the longest rectangle. I used chocolate covered donuts for the wheels, M&M’s (both whole and cut in half) for the headlights and WM and cheez its for the windows.