This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
An inexpensive chain for hanging painted glass panels, transparencies or photographs can be made by joining paper clips together to form the links. A box of 100 clips will make a chain about 10 ft. long. Such a chain can be made in a few minutes and a length of 10 ft. will hold about 4 lb.
Ill: The Paper-Clip Links may be Joined to make a Chain of Any Desired Length
If the chain is to be used for holding photographs, each inner loop end is bent out slightly.