Final answer:
In middle childhood, children are likely in the Middle Childhood Friendship Stage, where they become more independent, physically active, and involved with friends.
Step-by-step explanation:
In middle childhood, children are likely in the Middle Childhood Friendship Stage. This stage covers the ages of six to ten years, when children are in elementary school. During this stage, children become more independent, physically active, and involved with friends. They begin to play in mixed-gender groups and develop important social skills such as cooperation and sharing.