This small toy flashlight was part of the inspiration of this project.
I took it apart and found that it used a pretty simple set up and thought that maybe the cell could be a series of images instead of just one.
After some further research I found this old animation machine. Though much larger, it uses a similar design, where a large glass disk is spun and a Gleisser tube flashes light though the transparencies to create a weak projection.
So will all of this fit into a flashlight? I don't know! But I'm going to start taking apart some larger toy flashlights soon like this one to find out.