A “chatty kid” is a common phase in early childhood development, especially around ages 3 to 5, when children start to explore the world through language. At this stage, children are learning to express themselves, narrate their thoughts, and build communication skills. Constant talking can be a sign of a child’s curiosity and desire to connect with others. They often verbalize everything they see or think as they develop their inner voice. While it can be overwhelming for parents, it’s important to understand that this behavior is typical and helps children develop cognitive and social skills. Parents can guide their chatty kids by setting boundaries around excessive talking, teaching them when it’s time to listen and when it’s okay to speak.
https://www.parents.com/how-to-handle-a-child-who-never-stops-talking-8737444