Host Luke Burbank and announcer Elena Passarello tell us about their simple delights; poet Ross Gay ponders his fascination with the themes of joy and gratitude; Casey Cep, staff writer for The New Yorker, discusses her debut book about a mysterious Alabama murder case that captivated beloved author Harper Lee; and Colin Hay, formerly of Men at Work, performs "Come Tumblin' Down" off his album "Fierce Mercy."