It seems strange that a fish can open its mouth so widely. Focused and specific research can be useful. The Postalco Design Office also researches something that is unrelated to a particular product but just fascinates us. Thinking With My Feet was a small exhibition of drawings and photos that centered around a large working fish mouth prototype. We didn't know it at the time but understanding fish mouth mechanics was the beginning of inventing the Postalco Wheel Printer.