Who voiced the title character in a 30-minuted animated film based on a song written by Leonard Lipton and Peter Yarrow?
Puff the Magic Dragon (film): Puff the Magic Dragon is a 30-minute animated television film based on the song of the same name by Peter, Paul and Mary. Puff the Magic Dragon (film):  The title character was voiced by Burgess Meredith. Puff, the Magic Dragon: "Puff, the Magic Dragon" (or "Puff") is a song written by Leonard Lipton and Peter Yarrow, and made popular by Yarrow's group Peter, Paul and Mary in a 1963 recording.
Burgess Meredith