"Guess the Leader" is a great concentration/teamwork theater game that many teaching artists use to focus their class. Have the group sit in a circle. Pick a "guesser" and send them out of the room. Then choose a leader. While seated in the circle, the leader performs simple, repetitive movements, such as snapping their fingers or patting their head. Everyone in the group mimics these movements. The leader can change their movement, but both the leader and followers should do so seamlessly so as not to give the leader away. The guesser comes back, observes the group from inside the circle and must guess the leader. Once he guesses, the leader goes out of the room and becomes the guesser for the next round.
Line up children along one side of the room. The first child goes to the middle of the room and silently performs an activity, such as washing a car or cooking a meal. Give them a minute to start performing their activity before the next child enters and asks one line only: "What are you doing?" The person performing the activity answers with a different activity than the one they are performing, and the second person must begin performing the activity stated. The next person in line comes in and the game continues.
This acting game builds on "What Are You Doing?" by incorporating objective and obstacle into the exercise. Start one child on a pantomime activity, such as cleaning her room. Encourage detail in the pantomime. Another child enters the scene with an activity that prevents the first child from completing their task. For example, the second child pantomimes creating a collage for a school project. The children must figure out how to complete their own task without physically removing the other child from the scene.
Line up children in a playing space. Have them choose a setting and main character. Randomly point to one of the children and ask them to start a story about that character in the chosen setting. After about 20 seconds or so, randomly point to another student, who must pick up the story exactly where the last student left off and add to the story. Continue this until everyone has had one or two turns at the story. Encourage the group to work together to create a well-developed story.