Chloe Olson, 16, left, from the Pittsburgh Ballet Theatre, says hello to Gabriel Stout, 19 months, and his mother, Kathleen Stout, during a visit to the Children's Hospital of Pittsburgh of UPMC (@childrenspgh) on Tuesday. (Photo by Haley Nelson/Post-Gazette) #Pittsburgh #PGH #412 #PittsburghBalletTheatre #Ballet