The facilitator asks participants to stick badges, in a variety of shapes, colours, and sizes, somewhere between their waist and neck.
Participants are then asked to form groups. Also, they are asked to do that in silence. Facilitator gives no instructions about what criteria to use to form the groups (at least 2 persons per group). Once participants formed their groups, facilitator instructs them to break groups and form new groups. This is repeated at least three times.
Facilitator is taking notes on what background they are grouping.