The term used for a baby kangaroo is "joey." Joeys are born extremely small and underdeveloped and continue to grow inside their mother’s pouch for several months. Initially, they are primarily reliant on their mother's milk for nourishment. As they develop, joeys begin to venture out of the pouch to explore their surroundings while still returning to it for safety and feeding. This unique reproductive strategy is one of the defining characteristics of marsupials, including kangaroos, wallabies, and koalas. The bonding between a mother kangaroo and her joey is crucial for the joey's growth and survival.