Parents waiting on a child’s appointment don’t always want to wait inside. Outside Boston Children’s Hospital’s Two Brookline Place, a dozen FORO round tables and three dozen FORO chairs in Gunmetal Gloss Powdercoat give them somewhere else to be — a small patio at an eight-story ambulatory care building from Elkus Manfredi Architects and Stantec, built by Skanska, completed in 2021.