This semester I did the challenge with both of my Psychology classes but also a special class of 9th grade students. I thought that the results were particularly interesting and were insightful into the motivations of my students.
My 2nd period class was really odd! All but one group had a standing structure. That's pretty odd because sometimes I've had most of the groups fail to produce something that can stand. The other odd thing was that the winner for the class was only 10.5 inches. That's shorter than usual.