Print this (enlarge to 102%). It's 9 1/2 inches long and that fits on the MakerBot Replicator 2. Insert an ornament hook (or paper clip) in the top hole. Insert a drinking bird in the square side holes:Slide a C7 Christmas bulb (part of a light string) in the bottom slot. Rotate the bulb until the socket is a snug fit. After about one minute, the bird will start bobbing--roughly 15 seconds of "bob" and 20 seconds of "wait" per cycle. http://www.youtube.com/watch?v=LZnzyz4yiH0&feature=youtu.be