Your kid’s summer camp is likely fully staffed. The ice cream store near you probably doesn’t have a “help wanted” sign up. But your local swimming pool or nearby beach could probably use a lot more ...

When Rich Harrill was 17, his dad came to him one day just after the school year ended. “And he said, ‘Be ready in the morning.’ I said, ‘Where are we going?’ He said, ‘Don't worry about it,’” he said ...