In 1962, as the 1964 New York World's Fair was being planned, Barrett was commissioned to create the Sculpture Continuum Playground. In his book "Myself Emerging" it states that the "CONTINUUM principle was invented and patented by Barrett in America. Other designs based on the principle are available, adapted to various environmental situations." It is unclear as to what became of the playground following the end of the fair in 1965. Regarding this work, Barrett quotes a letter from the eminent art historian Herbert Read in which Read states, "You have given a new spacial development to the Art of sculpture."