Are you facing a difficult decision? A binary one? The Decision Maker is for you. A pendulum forced by the power of magnetism to oscillate between signs marked "YES" and "NO" until coming to settle on one of them, the Decision Maker is a simple and surprisingly time-consuming way to put your future in the hands of fate.
It's to be found on the Things Made of Cardboard YouTube channel (whose name offers a subtle clue as to its composition). Here's a tensegrity sculpture: