Take a trip to a hardware store, hobby shop or arts supply store and purchase telescopic tubing in brass or aluminum, as well as electrical wiring in copper, steel, aluminum or brass.
Cut the larger, round telescopic tubing to 2 inches in length and insert the square telescoping tubing within.
Weave electrical wiring of varying colors and materials in through the holes between the round and square telescopic tubing. Keep the wiring symmetrical.
Cut the 2-inch pin you just created with a scissor in half, and cut the ends of the electrical wire so they are the same length as the telescopic tubing.