Bicycle and motorcycle chains are a good basis for various crafts. Using welding, you can fasten the links and leave the necessary movable. In the same way, you can make the simplest "chain" craft - a nut cracker.
For a nut cracker, you need a small piece of a motorcycle chain, about thirty links are enough. For the convenience of welding, it is better to fix the chain on the surface giving it the desired shape.
The final step may be the coloring of the nut cracker to your taste and, of course, the tests for its intended purpose.