We used a toddler's toy to make our lamp — one in which a child would insert a big Ping-Pong ball in the top and watch it roll down to the bottom. You can use most any type of plastic, metal or wood toy to make your own lamp.
If you have extra space to fill, like we do in our smokestack, make a wooden plug to sit inside the hole so it holds up the threaded pipe. Measure the diameter of the hole, then cut the wooden plug to size. Drill a hole in the center to hold the threaded pipe. Place the wooden plug with threaded pipe down over the wire and into the toy. Tap it into place.