During the first day of summer break, the custodians opened every locker in the halls of Oberlin High School.  The locker doors would stand open for a few hours while the custodians cleaned them out; they'd throw all the contents into a giant, industrial-sized trash can.  OHS was small and quickly traversed -- if you looked at a floor plan of the hallways from above, it would look like a lollipop on a stick -- and an enterprising seven year-old could easily investigate each and every locker before the custodians finished, skimming out treasures:  mechanical pencils with plenty of lead, a miniature stapler, an abandoned ugly clay ashtray from art class, a red knit hat.  The school was empty, save the custodians, administrators, and a few teachers who were still finishing up their grades and cleaning their classrooms.  The halls were ghostly-silent, and anyone who'd ever fought through their normally boisterous cacophony would find the whole thing eerie. 
