Meet with co-leaders after the session to reflect on it. How did it go?
Talk about how the Riddle and Mystery program has gone in general. If time is short, consider meeting again soon to reflect at more length on your use of Riddle and Mystery. Plan how you will document your suggestions regarding its next use in the congregation.
Congratulate yourselves for giving a gift of time and energy to your congregation's sixth graders. Consider meeting sometime to enjoy each other's company without the pressure of making either plans or notes for the future.