1. The importance of infant intellectual development In the first few years after a baby is born, neurons in the brain continue to establish connections, which is a critical stage of intellectual development. Therefore, infancy is the period of fastest intellectual development. Good intellectual development can not only improve children\’s future learning and living abilities, but also have a positive impact on their physical and mental health. 2. How to promote the intellectual development of babies 1. Provide rich and diverse stimulation: let babies come into contact with toys of different types, shapes, colors and textures, and let them explore various things in the surrounding environment.