You heard from a newspaper that the town zoo was hiring for people to feed, and tend to the animals, while some of the other people who didn't work for them get to see what they do for fun. Once you've heard about the applications, you get everything you had to wear, and go to where the zoo's address was.
All the zoo attendants wore green t-shirts as uniforms, and while they were good at their jobs, they also have been capable with bringing in animals from different parts of the world, such as Africa, the South Pole, and even some in the United States. Many different creatures had different attributes like elephants, who could spray water with their trunks, monkeys who could climb trees, or even kangaroos from Australia who keep their kids in their skin as they hop all over the place.