This fascinating desk toy highlights the strange property of a straight pole fitting perfectly through a curved hole when spun around a central axis. It's a simple, no frills illusion, but it sure is satisfying to watch!
This download includes all parts necessary to assemble this model. Some glue required for assembly.
03/20/18 UPDATE : Added an 'upright' version of the pole model. I've found that printing this way with minimal supports at the very bottom produces cleaner results