This is a miniature truck meant to be a player piece on a Monopoly-style board game. Total length is 30mm.
Initially I tried scaling down an existing model (see model this is remixed from) but was having trouble with lines becoming thinner than my extruder width. So I remodelled this from scratch, using the original design as a template but modifying all walls to be multiples of 0.4mm and any vertical features to be multiples of 0.2mm. I didn't spend a lot of time perfecting things like the grill, as when this is printed this small, I don't notice a huge difference. Note this is now a single piece and has no moving parts.
This was designed to be printed on an FDM printer with a 0.4mm nozzle with a 0.2mm layer height. A smaller nozzle or shorter layer height should work fine, but if you go bigger for either I am not sure it will print cleanly.
Note: Model shows in Thingiverse on its side but is intended to be printed wheels down.