A rental flatbed truck could be hauling anything. Bags of stuff, cement, sand, fertilizer. etc. They aren't hard to make. Years ago one of the administrative assistants where I work had a small Zen rock garden on her desk. As a joke I made a stack of bags of Purina Rock Chow to feed her little rocks so they could grow up big and strong.
A little CAD work, a color printer, some glue, and a scrap of foam and you get something like this.
