Everyone has to work together to get the balls from one bucket into the other without spilling.

Tie enough rope to one bucket for each person in the team/group. Add 4 or 5 balls to that bucket. Set it next or across the room from the empty bucket. On ‘GO’ everyone grabs a string and works together to get the balls from one bucket to the other without touching anything but their own string. Fun for middle school age kids and up!