You must be able to “ prepare and serve food and beverage items to guests” that entails making whatever food item your stand serves and having to explain to guests “ no sir. We cannot make your burger rare. I understand sir that another server might've done it for you before, but legally I cannot.” And then endure them yelling at you.
And if you're worried about not getting exercise, don't be! We've got you covered. You'll have to lift heavy crates that your manager should be doing because they're old enough to, but you'll be stuck doing