In the last two weeks, Madge has lost her lunchbox twice and a sweater once. I think the warmer weather is to blame because she's more eager to go outside (and once there, to take off the sweater).
I found the lunchbox in the lost and found bins and the sweater was returned by a teacher.
But here's what I'm thinking. Next time she loses one of these things, I'm making her dig for them herself or I'm just replacing them.
It appears that the most frequently misplaced item is a lunchbox, and a lost lunchbox invariably contains leftovers, which do not improve over time. In other words, between the rancid food and musty clothes, the lost and found bins are a masochist's delight.