This Peter Yarrow song about the end of childhood innocence was made famous by Peter, Paul and Mary. (Notwithstanding rumors to the contrary, Yarrow was adamant that it was NOT about you-know-what.) I used to sing this to my children and they couldn’t stand the ending, so I wrote an additional verse for them. If you’ve always hated the image of Puff slinking off to his cave, hang around for the last verse.