Materials: aluminum foil, black felt marker, pin, opaque tape, piece of cardboard.
1) Flatten a 1 inch square of aluminum foil on a piece of cardboard.
2) Blacken foil on side with the black marker
3) Gently make a hole in the center of the foil with the pin [small cactus needle?]
4) Remove lens from camera
5) Carefully tape pinhole over camera, black side towards camera
If you have a camera with an automatic exposure, then you can begin taking pictures. You will have to guess what you are taking a picture of because the image in the view finder will be too dark.