Jay North (TV's "Dennis the Menace") plays a youngster who, not having the heart to let the animals endure the local zoo's rundown conditions, sets them free. A trained bear bicycles along the boulevard. An elephant lumbers along the sidewalk. An ostrich who hungrily gulped down a transistor radio plays a top-40 musical potpourri. And a young boy thinks his wish for a pony has come true when he discovers a Zebra in the Kitchen.