I am sure that Mr. Koppelman would be able to give you a more definitive answer than I can; and, so, I would recommend you read his very readable and informative book.

But to say that Lee Hays was a creative force in the group would be an understatement---he may well have been the core of the group. He also related to children with another group--The Babysitters (which included the young Alan Arkin). He was also a prolific author of essays and short stories.

Again--I recommend you read the book for a wonderful read and insight into Lee Hays. An earlier book by Doris Willens is also a must read on the subject.

Bill Hahn