The Mermaid Theatre of Nova Scotia from Canada will present a double bill of puppetry, "Goodnight Moon" and "The Runaway Bunny", in late July. "The Runaway Bunny" focuses on a young rabbit who imagines leaving home. However, whatever the little bunny declares he will change himself into - a fish, a rock, a bird, a boat - in his pretend game of hide-and-seek, he always ends up being found by his mother.   Close