Expert Witness

10 to 20 players. The first team stands in front of the other team. The second team studies the first team for 30 seconds. The first team goes out of the room and makes a small change in one member's appearance, such as removing a bow or buttoning a sweater. The team left in the room should plan its strategy for finding out what the change is. For example, each team member could study one member of the other team.