here are some files you might want to download …
a list of all materials needed for one class and their prices (in german!) (pdf, 204 kb)
the english texts of this website as a word file, for those who want to help me translate it (word, 64 kb)
a czech cardboard pinhole camera, from www.pinhole.cz, © 2009 david balihar (pdf, 416 kb)