Here is a fun kinetic piece by Randall Cleaver that features posable artist's hands playing with the classic Slinky toy.
From the video description:
This is my newest found object clock. It is called "A Waste of Time". I used an Arduino micro controller to activate a stepper motor that will turn the sand glasses once a minute. The case is an old gas heater I found at Community Forklift in Maryland.
See more fascinating kinetic works on Randall Cleaver's YouTube Channel.