By wearing a light weight attached to your penis for many hours a day, some people claim you can make real gains. Frankly, I have never heard of anyone making much progress with light weights.
This type of weight could also help restore foreskin. If you don't want to grow foreskin, make sure the weight rests on the glans (head) of the penis, with no foreskin in between. You'll probably want some cushioning, since it won't be very comfortable.
(see Circle Device - www.dfranceinc.com)
The most compact to use, it is also the most difficult to construct.
You will need: Lead, or (safer) lead-free pipe solder, container with sand or plaster of Paris, heat source (camp stove, kitchen stove), ladle to melt metal in, large vice and hammer (not needed for lost wax technique).
Cast two flat metal ingots approximately 6 cm x 5 cm x .75 cm, using a sand or plaster mold. Caution: molten metal can be dangerous.
When cool, use hammer and vice to curve them (this is noisy and hard work!). Thoroughly cover in duct tape or Plasti-Grip (the stuff used on tool handles) to avoid lead contact with skin.
Put tape on both sides to create a hinge. Do this while holding the pieces as close as possible to the actual position they'll be in when used, to avoid pinching.
Hold in place with two rubber bands.
Lost wax casting: Alternately, form two wax slabs approximately 6 cm x 5 cm x .75 cm, and curve them to a radius approximately twice that of your flaccid penis. Fill a wide paper cup or other disposable container with enough wet plaster to accommodate both wax forms. Set them on end in the plaster, and let the plaster set for an hour or more. Overnight is best.
Using your heat source, heat the plaster until the wax melts and runs out. (Don't drip the molten wax onto an open flame!!!) You can use hot water to melt the wax, but let the mold dry thoroughly before pouring molten metal!
Pour molten metal into forms.
After a few minutes, drop the mold into cold water. When cool, break away plaster and clean up your cast ingots. File them to remove sharp edges.
This is bullky, a bit of bother to construct.
You will need: Denim or other cloth, lead weights (used wheel balancing weights), needle and thread, rubber bands.
Start with a 20x20 cm piece of material
Cut out a 10 cm x 10 cm corner, leaving an "L" shape
Fold one flap over to hold weight
Sew it closed, and wrap around penis, holding in pace with elastic bands (or Velcro).
Crude, but a quick way to test the idea.
You will need: An old sock, some coins, rubber bands.
Put coins in a sock. Wrap sock around your penis (pull your penis while doing this). Keep wrapping (to keep coins from falling out!). Hold in place with 2 or 3 rubber bands. It's not perfect, but you'll get the idea. Attention Kmart shoppers: Experiment with one-pound wrist weights or golf club swing weights in the sporting goods section, or any other flexible weight you can strap comfortably to your penis.