Pathlost is a doing bit (well, a lot) about pinhole cameras.

Make your own simple pinhole camera to produce a photographic paper negative or a solargraph. Use a simple formula to determine the correct aperture (pinhole diameter) and exposure time for your camera (paper sensitivity, distance from pinhole to the papers focal plane) to produce a working exposure and have the results developed. Alternatively take your ‘new’ camera away with you and place it outdoors for a couple of months to produce a solargraph, tracking the path of the sun, and scan it at home. Full instructions and basic materials supplied.

This sounds good – I’ll definitely have to hear about setting the correct pinhole and exposure.

There's a shed at the bottom of the garden...
Photo by Pathlost