My DD is three and for the last six months or so, I've noticed she has started leaving one item out and placing or hiding it somewhere - it could be a character toy, a piece from a game, a piece of puzzle, a train track, a book from a book set etc. She is normally very happy, but gets extremely upset if I move the separated item. It's getting more and more frequent. Today it's now progressed to food where at lunchtime she got hugely upset when I went to throw away part of her sandwich that she wasn't eating. Tonight whilst "helping" me make spaghetti (breaking it in half), she's had a total meltdown when I went to throw a stray piece of uncooked spaghetti away as she wants to keep onto it and had deliberately separated/hidden it. Does anyone have a clue what this is about or how to manage it?