We did this with our junior teens and it really helped build the friendships. You divide your group into seperate teams and explain to them that they are going to be judged based on their co-operation rather than winning the event. We then set up 6 different low ropes or team building activities. The teams went from activity to activity and the team at the end who worked the best won. It was great we made a video of one of the youth leaders talking like seen on the beginning of survivor and did all of the events in a sugar bush near us. At the end we discussed how some of the events reflected our life with Christ.