Mention summer camp and visions of marshmallows in the campfire, poison ivy, and bee stings come to mind. Perhaps a fond memory about singing around that camp fire also comes...
And in the beginning, there was safety in open strings. In whatever activity you prefer, use a progression in which the student can play an open string when they panic...
Many musicians know John Philip Sousa composed the Nobles of the Mystic Shrine March, but few people know about the Shrine Bands raising money for the Shriners Hospitals for children.