1. The development stages of infant intelligence. The development of infant intelligence is a gradual accumulation process. It has a foundation from birth, but it needs to go through different stages to gradually mature. These stages include: sensory and cognitive development, language and social development, motor and body coordination development, etc. At each stage, parents can use different methods to promote the development of their baby\’s intelligence. 2. Promote the sensory and cognitive development of infants 1. Vision: In the newborn period, vision is still in the early stages of development and can only see clearly