Nurses aide Matt Sammis, below, gets a checkup Thursday from Josue Latin, a patient at Shriners Hospital for Children. It was sweet revenge for the children who changed places with staff this week. They had the opportunity to diagnose and treat the medical staff, including taking temperatures, determining blood pressure, bandaging wounds and -- the most popular activity -- wrapping casts. Transmission coordinator Jessica Shultz, right, waits while Mircelia Yutronic prepares an intravenous injection.