1. Reasons why babies are active. Babies are active due to their physiological and psychological characteristics. First of all, the brain development of infants and young children is not yet mature, and they need to stimulate their neurological development through exercise. Secondly, babies are naturally lively and active, full of curiosity about the surrounding environment, and need to explore the world through exercise. In addition, the influence of the family environment can also cause babies to be active. 2. How to meet the baby’s exercise needs. In order to meet the baby’s exercise needs, parents can take the following methods: 1. Provide a safe exercise space: Provide a safe activity space for the baby at home or outdoors.