I had a fair amount of off cuts of several thicknesses of cherry from the furniture that I have been building. I wondered for a little bit what to do with it. My small series was made mostly of 3/4" material so it made since to just double it, sort of.
The problem was that the lumber I had was not all the same thickness and too small to run through a planer. I took some liberties on thicknesses and dimensions to make it work. I only had enough off cuts to make four different models. I probably like the jeep and the plane the best. I would like to see what the dump truck would be doubled. Maybe after a few more projects.
Fun project to double the size. I needed to enlarge a couple of the templates. I took a couple of liberties with the dowel placements and widths. It was also surprised how big they were compared to the originals. I will probably do this again when I get different thicknesses of lumber.