I have used this activity over and over in both academic classrooms and corporate training environments with great results. Squares can be a very deep learning experience with very simple tools and preparation. Any group of participants that can gain an advantage through discovering the effects of good and bad communications, the need for teamwork, and the barriers typically experienced in organizations or teams. You can run this exercise with twenty people but it becomes very intense, specifically from a safety standpoint. A group of seven to ten is a more manageable group.
Activity Form the participants into a group in an open, controllable location.
Ensure that it is a level area, with no obstructions, or other opportunities for anyone to fall. On a safety note, it is a must to monitor those walking while blindfolding, typically you should have one person for every two participants to ensure they are safe while moving about. Advise the participants that they are to place their blindfolds on and that they must form a perfect square with the rope while blindfolded. Provide no guidance on who should lead the group since this typically occurs naturally. You may set a time limit if you choose, but the most important thing is that the group has an opportunity to be successful, even if this means more than one attempt.