I'm sure someone will point out a half dozen of these threads, but I didn't find any general thread for art objects. I mean works that are "truly" 3D, such as carvings, mobiles, glass or metal sculptures. I'm setting the bar low here with something that a ten year old could have done. In fact a ten year old did this.
This is my son's Planet Express Ship that he carved from balsa for his cub scout pack's "rocket derby." I carved the side towards him and he carved the side you see and he decorated it. The PE logo was created the old-fashioned way; I shamelessly printed it from a fan site and he glued it on. The white thing on top attaches it to a wire and the propeller pulls it down the track in a race. I warned him that it would not be as fast as the slimmer "rockets" the other boys would have but I assured him that the laser cannon in the turret would even things out. Alas the laser cannon did not function on the day of the race.