Modern Magic with Liquid Air: A physics lecture becomes a three-ring circus when professor John Satterly explains the facts of liquid air to a University of Toronto freshman class. Canada's Biggest Bird House: Home to tens of thousands of sea birds, Bonaventure Island echoes each summer to the cries of gannets, gulls, and puffins. City Mobilizes for Crippled Children: A heart-warming community enterprise is found in Sudbury, Ontario, where citizens have converted an old mansion into a physiotherapy clinic for physically disabled children.