Here's the good news: General Electric has created a wonderful 3D model of a jet engine that anyone—even those lacking an aerospace engineering degree—can build themselves, complete with moving parts and a cutaway design so you can see everything in motion.
But here's the bad news: GE isn't actually selling the models. It's only making twelve of them available through a contest on its website to a dozen lucky aviation enthusiasts in the US. However, it looks General Electric is letting anyone with access to a 3D printer make their own. Links to the instructions and requisite 3D models can be found here, including templates for printing your own cardboard box as well. [Arts and Aircraft via GE Tumblr]