The design files can be downloaded here: http://www.thingiverse.com/thing:8788
The paper needs to be fairly thick because it needs some stiffness to operate. I use a 14 point (0.014") paper
It can be cut by hand, but it would of course be much easier on a laser or paper cutting machine.

































I think the actual assembly would be confusing and hard to understand in written form, that's why I just did the video for this one.
I printed the design and I have no idea how to do it
Thanks so much for sharing templates and instructions.You've saved (a small but significant amount of) my life.