Find children's puzzles, preferably the kind with larger than normal pieces and put them into unmarked bags. Split the youth into however many teams you have puzzles and explain that their task is to complete the puzzle as fast as they can. Some will likely assume it is a race, but it is not. As an added challenge, tell them not to talk but only communicate with one another non-verbally (this wrinkle helps to draw out the less-talkative youth as leaders). The Twist: What the youth do not know is that you have actually mixed some of the pieces of each puzzle into the other bags. The only way any group can complete their puzzle is to realize that they are not in competition with the other groups but must in fact work cooperatively. See how long it takes the groups to catch on to this tiny expression of the Empire of God.