Muscatine, Iowa Exhibit Size: 3,500 square feet Services Performed: Exhibit Concept Design, Graphic Design and Production, Hand-Painted Murals, Fabrication In the heart of the Midwest lies the Pearl Button Capitol of the World—Muscatine, Iowa. The ready access of freshwater mussels is one contributing factor, but even more so are the vision, innovation, and hard work of its people. Split Rock Studios designed and built exhibits for the updated museum. Numerous walk-through immersion environments, including a simulated factory with oral histories, tell the story of industry in Muscatine. Visitors can use the johnboat clamming interactive to collect mussels for pearls.