One activity I participated in years ago and have lead as a facilitator is Lost on The Moon.  This activity has your team lost together on the moon with only fifteen items.  Each member must rank the items individually in terms of importance to the team's survival and then the team ranks the items using consensus.  The most amazing and humbling aspect of this activity is the way the team almost always outperforms the individual.  Unless you have a NASA expert on the team this exercise will show the importance and potential of collective wisdom or two heads are better than one.The link to the activity, items to be ranked and NASA's answers can be found here.

If your team has already performed this activity try Lost at Sea found at this link.

While the activities themselves can be fun the most important aspect of the activity is the debrief questions that should follow.  A debrief is simply a set of questions that are asked after an activity to help better understand the dynamics of the team and its performance.  A few of my favorite debrief questions include the following:

Another set of potential questions in order:

Are you looking for a team building activity that will help your team appreciate each other more and work at a higher level?  Are you willing to look hard at the dynamics of your team and truthfully ask the debrief questions to uncover areas of conflict and opportunity for growth?

Try playing the Lost on the Moon or Lost at Sea activities listed above. The total time needed will depend on your team's size but allow a minimum of one hour to possibly ninety minutes to complete the ranking sheet, reach consensus on the fifteen items and debrief.  Choose the debrief questions listed above and have each member complete them individually first and then share as a group.