Here are some internet pointers we've found that have something to do with pinholes.
Larry's Pinhole Pictures
The Pinhole Resource
Oatmeal Box Pinhole Photography
Pinhole Photography Ring
Pinhole Photography - History, Images, Cameras, Formulas
the pinhole gallery
Pinhole eclipse images
Solar eclipse pinhole viewer
Image formed by a pinhole using three light bulbs in a box.
Airey's disk: Pinhole diffraction using laser beam.
Pinhole cameras in space!
More pinhole cameras in space!
How to make and use a pinhole camera from Kodak.
Wikipedia entry on pinhole cameras.
Science Learning Network