Final answer:
Children first show interest in peers around the ages of 2-3 years old. As they get older, around 6-10 years old, children become more interested in friendships and being a part of peer groups. Peer acceptance becomes more important and can impact their self-esteem.
Step-by-step explanation:
Children first show interest in peers around the ages of 2-3 years old. At this age, they start to enjoy playing with other children and begin to explore social interactions. However, they may struggle with sharing their possessions and may have difficulty cooperating with others. As they get older, around 6-10 years old, children become more interested in friendships and being a part of peer groups. They may participate in activities like sports teams or scouts. Additionally, during this time, peer acceptance becomes more important and can impact their self-esteem.