IJsbreker: Wat heb je opgemerkt?

Line the participants up in two lines facing each other. Give the participants 30 seconds to look at each other closely, paying close attention to small details. The first row of participants turns and faces the opposite direction while the participants in the other line change something about themselves. For example someone might take off their tie, or put their hair down. When the participants turn around, they have to guess how the person they observed has changed themselves. The participants then switch places.