Final answer:
Children's concepts of friendship and the ways they act with their friends change with age, reflecting cognitive and emotional growth. From the ages of six to ten, children go from playing with same-gender friends to starting to play in mixed-gender groups. They also develop theory of mind (TOM) and start to understand that people have different thoughts, feelings, and beliefs.
Step-by-step explanation:
Children's concepts of friendship and the ways they act with their friends change with age, reflecting cognitive and emotional growth. From the ages of six to ten, children go from playing with same-gender friends to starting to play in mixed-gender groups. They may enjoy playing on a sports team or participate in scouts or other formal peer groups. Children aged six to ten years may be somewhat fragile emotionally, as their self-esteem may change rapidly depending on how they think others perceive them. They also develop body modesty and express an increasing desire for privacy, although they can also display immature emotions and behaviors. An important cognitive change occurs in children aged three to five years when they develop theory of mind (TOM) and start to understand that people have different thoughts, feelings, and beliefs.