Birthday Line Up
This is a great team building or ice breaker activity.
Inform that group that they can not talk from this point forward until you give them permission.
Have the group get in a line.
Tell them they must, in silence, get in order by height.
Once they successfully compete this challenge, you can give the following line up tasks: line up by birthday month, first name, # of years at camp, etc.
Source: Ultimate Camp Resource