There’s construction around the Big Building, so the kids can’t edge it. Edging is an age-old school activity in which the kids go all the way around the Big Building, holding on to the various pieces of molding, columns, etc.. Sort of like buildering for the under-13 set.
I wonder at how many schools kids climb on the main building? It’s more the sort of thing they do at Cambridge or West Point, than an elementary school. (Though no one has put a car on the roof… yet.)