For the last six years my kids have been in elementary school, I've been the volunteer to "manage" the lost and found. There are times it can be a full time job!!
In our lost and found there have been everything - backpacks - yes BACK PACKS, lunch boxes, sweaters, shirts, socks, shoes, barrettes, scarves, umbrellas...many many things.
For things that have names, I contact the parent(s) and let them know the item is in the lost and found. It is then the child's responsibility to then get it. If they don't, it is donated to Goodwill - we make the trip twice a year. Parents know this too.
how do kids forget BACKPACKS? Probably very easily when the parent doesn't take the time to get involved and just runs out and buys another O.. Coats? I know we have more than O. winter jacket in this house for our boys...however, if they lose it - we don't run out and buy them a new O.. They must find it...if they left it at the park? Guess they will get cold. money doesn't grow on trees in this house!