This is a very basic kit that will allow you to use a very bright LED flashlight to project an image onto a surface with a camera lens.
See http://www.disruptivelyuseful.org/ for a great overview of how this type of projector works and how you can build one yourself out of parts from the hardware store.
Non-printed parts:
Flashlight
Lens
4 Hose Clamps
Assembly:
Use the Fusion 360 file to change the inner diameter of the caps to fit your flashlight and lens.
Print both caps, the main body, and as many slides as you'd like.
Attach the flashlight and lens to their caps using hose clamps. Use the remaining hose clamps to secure the caps to the main body.
Print (or draw) out the design to be projected and use clear tape to attach upside down to the slide.
The author hasn't provided the model origin yet.