S.H.
Crayons, pens, pencils, glue, socks, and now, I do not know where my son's jacket is!
All these things have a place. My kids know that. They get it, they put it back. It is often in a plastic little box or basket they can tote around (hence keeping it together) or in a pencil cup on the miscellaneous shelf. So how it ends up missing in action, is one of those unanswered phenomena in a house with kids. LOL
My kids' jackets, same thing. But for some reason, my son cannot remember where his jacket is. Darn.
Oh, but my son KNOWS where all his tiny little Lego pieces are and which ones are where.
He has a box and a shelf for all of it and is actually good about organizing it.
Oh, and have a place for broken pieces of whatever.
I have a plastic bowl, that we put all these sorts of things in. My kids know and do it. So when we are looking for something, they know where to look.
Oh and another reason why things may disappear is.... when I vacuum. I just vacuum. I hear things going in it. Oh well!