At most entertainment facilities, the majority of employees are teenagers. This makes sense because they're cheap labor, they're typically not in school when you're open, and they tend to be easy to mold into the type of worker that you need. But which kids should you actually hire? Who is easiest to mold? Who would be best suited to carry out the goals of your entertainment facility?
The best thing to do is to seek out and hire shining stars. By this, we mean look at kids in show choir, kids who play sports, and kids in bands. Why? Because they are comfortable in the spotlight. In fact, some of them crave it.
Your facility is entertainment; a show. When employees are on the clock, they are "on stage". Nobody does this better than Disney - and it's always good to take a page from their book. Kids that engage in sports or choir understand how to act in front of large groups of people, and they are comfortable in their own skin. They are able to pick up on training much faster and "perform" in front of your guests. Would you want to spend a lot more time and money trying to train kids that don't know how to speak in front of a group? Or kids that have stage fright? Or kids who don't have experience balancing school and extra-curricular activities like sports (or work)? The short answer; probably not.
Obviously, you won't be able to hire exclusively from the drama departments at the local schools, but it's at least a great place to start. And once you train one shining star, they can be a model and example for other employees that you hire in the future.