A cylindrical chip can with a metal bottom (like the kind Pringles come in). This works best, but you can also use an empty paper towel roll.
Aluminium foil.
Waxed paper.
1 sheet black construction paper.
Tape (masking or electrical).
Straight pin.
Ruler.
Marker.
Xacto knife, utility knife, or box cutter.
The Steps...
Step 1: Find a suitable container to use, for example; hot chocolate tin, normal tin. Make sure the tin you use has a lid and that its made of light proof.
Step 2: Make sure you paint the inside of your tin, so its all black/dark inside. So this will allow the light to bounce around inside the tin, due to you can get a clear image.
Step 3: Cut a rectangular hole half way through your container.
Step 4: Cut around 2.5cm square piece of aluminium foil, make sure it is nice and smooth. Use a small pin so you can make your little pin hole on your tin. But it has to be in the centre of the foil.
Step 5: Attach the aluminium foil to your contain, make sure you pin hole is over the rectangular hole that you created.
Step 6: Make a shutter with any material, so that you can open and close whenever you need it.
Step 7: In the darkroom (under the red light) cut a piece of special paper make sure it fits inside your container.
Step 8: Now take the camera outside and place it somewhere stable so that the camera does not move while its on 'process'. Make sure your shutter is open and its will start exposing.
Step 9: Close your lid of your shutter and it will stop exposing. After take your camera to the darkroom and after put your paper into the chemicals