1. Motor Skills: This includes both gross motor skills like sitting, crawling, and walking, and fine motor skills such as grasping objects and scribbling. 2. Cognitive Skills: This involves problem-solving abilities, logical thinking, and understanding concepts. 3. Social and Emotional Skills: These skills include interacting with others, showing empathy, and understanding emotions. 4. Language Skills: This encompasses both receptive (understanding) and expressive (speaking) language abilities.