If you are a photographer and want a challenge, try Pinhole Photgraphy.  It takes extreme patience and creative thought to master, and for the record, I don't consider myself a master of it.  I'm still learning it, but I've learned enough to share with interested beginners.
 

        Page One:  General Info on Pinhole Photography

                              Page Two:  Info on Pinhole Cameras

                                                      Page Three:  Miscellaneous Info and Links

                                                                                Pinhole Photographs by Nicholas Kuckel