Sometimes simple is better, when facilitators are trying to engage a group of participants, create discovery opportunities, or reinforce learning objectives. A very simple exercise that I experienced in ropes courses and through the Atlanta firm, Executive Adventure, is one called Squares. 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.