It's pretty neat until you realize that from the Slinky's point of view, it's a human attempt to create a Sisyphean hell for all Slinkykind. Matthias Wandel's eternal Slinky escalator amuses us to no end and horrifies any Slinky that watches it.
Wandel made his escalator with a looped wood chain of steps. He tried to use an electric drill to automate the task. But after failing to get the right speed, he opted for a simpler and more effective hand crank. Just turn at the right speed and the Slinky will never stop its labor.