The Challenge Program at the University of Michigan is an activity-based program which uses a highly interactive and experiential approach to teambuilding and other aspects of organizational development. Since 1990 the Challenge Program has provided hundreds of organizations with dramatic and dynamic learning opportunities. We use activities as the medium for helping a wide variety of groups and organizations explore issues such as team dynamics, communication, goal setting, trust, commitment. We help participants and groups learn about themselves and how they work together.