I got an email from one of my sons today in which he told me about this paper 35mm pinhole camera that was made in Eastern Europe my fellow members may be interested in having a look at, here's the link www.pinhole.cz/en/pinholecameras/dirkon_01.html
I made one of those a year ago. It was a bunch of work, but not very hard. Just be sure that you don't make the pinhole too large- the film plane is not very far from the shutter.