1) Start the activity with the traditional name toss.
2) Once the group has successfully completed the task, instruct them to pass the ball in the exact REVERSE order.
3) Once the group has successfuly completed that part, introduce a second ball or object of a different color/style/shape. Instruct the group that they must pass the ball in the original order, and the second ball in the REVERSE order at the same time.
Eventually, the objects will cross at one person. Good times!