Flight attendant, do you think you should let him do that?

Today we said goodbye to sunny, warm BA and boarded our flight to Bariloche. Looked like an almost empty plane for the 2.5 hours flight until wait, what's that commotion down the concourse? Why yes, of course, it's the arrival of the 70 or so 12 year olds (90% boys) who are on our flight. Need I say more? No button was left unpushed, no seat left in one position for more than 5 seconds, no camera flash fight too long for this crew. Naturally there was the screaming, group singing, applause etc. Do I look happy?