Chain through the hoop
A hula hoop is required. As an alternative, you can also use a rope that is knotted to a circle. This makes the game easier in some aspects (the rope is flexible), but also harder (the slack rope is harder to work with).
The participants of each group hold each others hand, resulting in a chain of players. This chain has to walk through the hoop, without letting lose their hands. Other members of the group may help the players to fit through the hoop, but they as well may not let lose their arms. Which group is the first to solve that task?