When John Kellett invented the Inner Harbor Wheel to collect trash from Baltimore’s popular waterway, he never imagined it would have eyeballs. Or a Twitter account. But these features have made the trash collection contraption—commonly known as Mr. Trash Wheel—beloved by many Baltimore residents, and helped the Healthy Harbor Initiative come alive.

“Ever since we installed the googly eyes on Mr. Trash Wheel, the awareness and excitement around this whole idea of cleaning up the harbor has explod…