If you enjoy this week's activity, consider placing it in your church's Sunday bulletin or weekly newsletter. They will always cherish the times of laughter. Ask questions, give assignments, invite participation. Keep the sense of excitement and anticipation through variety. Remember, repetition is the best teacher.
Every action has a reaction.
For example, you might suggest that everyone promises to participate in all activities and discussions. And that all involved promise not to be unkind or put down one another. Place them so that when one is bumped or knocked over, the others will follow in a chain reaction. See how long and complicated you can make these lines of dominoes before one falls over and knocks down the rest. If you knock one over, it knocks down all the others in line after it.