Exhibit Columbus Design Fellow Sean Ahlquist, right, watches Jousam Barbosa Batista, seated, and Myka Nelson interact with a his sensory playscape at Clifty Creek Elementary School in Columbus, Ind., Thursday, April 4, 2019. Ahlquist, a professor of architecture at the University of Michigan, designed the sensory playscape for students with special needs. He was testing the playscape at Clifty Creek as part of his work with Exhibit Columbus. Mike Wolanin | The Republic