We were given the task of building the tallest tower in our groups but had to work as a team to do it. We decided on some rules that would help us. These were:
-to listen to each other
-to be kind and respectful
-to give everyone a job
-to make it fair
-to share ideas and resources
-to speak calmly
On the Year 4 Classroom Blog 
I enjoyed doing this soooooo fun