We refer to the Thomas and Agnes Carvel Foundation Center as The Monkey College, because it has four levels or stages of training, ranging from very simple fetching tasks to more complex uses of home-environment objects. The formal training program lasts 3-5 years. Only positive reinforcement rewards (i.e. treats, verbal praise, and affection) are used to motivate the monkeys. If a monkey cannot perform a task correctly in any given training session, the lesson/task is revisited at another time. Perseverance, ingenuity, and praise are the key to training a service monkey.