Ugo Schildge’s cogwheels are mesmerizing. He makes paintings with them and uses them as metaphors to think about time, human nature, and the need for adjustments. The broken and spinning images are enthralling. The squeaks and thuds keep the experience real. We chilled out to these videos during a break. Now, we might need to paint or put stickers on our gear sets to move past the standard color palette. Here are four bestselling gear sets.