The people with the yarn balls hold the end of the string and gently throw the balls across to someone else, calling out that person's name. Then, those people hold the string and throw the balls to a third person, and so on, until the balls have been unwound. When the yarn net is complete, ask group members to pull back very slightly. Now, ask one person to drop out. Note that it is important for a group to be able to count on all its members.
Some individuals serve as nodes, connecting many different people or networks.
Divide group members into groups of three to six. Appoint someone recorder. Participants brainstorm uses of small, common items. Items for consideration include paper clip, pencil, coffee mug, shoelace. Record responses, and then compare lists among groups.