Am I Old or What?

So the other day, one of my third graders had misplaced her jacket and came up to me inquiring where she could find the "Lost and Found." We had recently moved our Lost and Found to a small booth in the hallway that used to house a pay telephone, years since removed.  I told her to look in the room down the hall where the pay phone used to be.  She look up at me with a confused look and said, "Mr. Walker, what's a pay phone?"  Were the days before mobile technology really that long ago?  Uh, yes.