Guessing it’s all official, I’ll be running a pair of pinhole camera building workshops for the next 2 Sundays at Tate Liverpool.
http://www.tate.org.uk/whats-on/tate-liverpool/courses-and-workshops/build-pinhole-camera
Since posting last, I’ve redesigned the camera a bit and tested it out. Decided to add a tripod mount using a 1/4-20 nut and a pair of strap loops. Takes me about half an hour to construct one using masking tape, glue and a bit of sandpaper so there should be easily enough time in a 3 hour session for everyone to build their’s. 
James Nixon 