Our friend is a realtor. He requested this cake as a gift for his clients who just bought a house through him. This particular house has a ribbed-glass front door and backs up to a railroad changing-station (or some such).
Most of us might think living next to the railroad tracks wouldn't be our ideal location, but they have a young son who is enamored of the entire scene in his new back yard.
How cool is that!
I also hear that more than a few adult males in the area are fascinated by the goings on in that railroad changing yard.
Boys will always be boys.