I will definitely use the paper airplanes as an ice-breaker and group selection tool. I usually have a group term project and have either allowed the students to pick their groups (which does not always produce the best work) or have selected them myself randomly. I also allow them to select a team captain (again, this isn't always the most effective since sometimes there are more than one natural leaders), or selected the captain myself if nobody volunteers (again, not effective because if nobody wants to lead and they are thrown into a leadership role, results are not always positive). This activity allows the students to be involved in the group selection, have fun during the process, and get comfortable with each other in a new way. I will post on my results.