Capuchin monkeys are known for their intelligence. They have high cognitive abilities that enable them to solve problems, use tools, and learn by observation and imitation. This intelligence makes them extremely trainable, and they can be taught a wide range of duties and tricks. For example, Capuchin monkeys have been trained to help people with disabilities by fetching belongings, opening doors, and turning lights on and off. Their ability to learn and adapt makes them interesting and entertaining companions.