New school year means that it's time to meet new parents. And, of course, to see the old ones again. While I'm not quite as direct as Coco and say to their faces that they have "dying skin" I will say behind their backs that they have dyed hair.
What makes the hair dying so interesting during pick-up and dropoff (Cartalk's Russian chauffeur, btw.: Pikap Andropov) is that the grey and white roots come and go in waves. It's almost as if the mothers' time of the month has changed from what it used to be to a time to get out of touch with their roots, so to speak.