Why are children sensitive to laughter and think they are all laughing at him

Children are particularly sensitive to people's expressions. Even a baby will imitate people's expressions for several months. If you smile at him, he will smile back at you. Older children are more sensitive to adults' expressions. If a person who is always smiling and looks cheerful, and should be a person who likes children better, children can feel his love from your expression. Therefore, children will feel happy when they see you, so they will smile at you when they see him, and so will I. Every child in our courtyard will smile when they see me, and the older one will call me when they see me, because I like the child from the bottom of my heart when I see him. So children like me, too.