My DS (2.5) has muslins as comforters. Over the last few days he's started telling us they're not his muslins, and getting very upset searching for "my muslin". I've found all of his muslins in the house, all of which have been rejected. I've offered him his baby brother's muslins (different colour) which I've been told are "DS2's muslins, not my muslins". Some of his muslins are dirty, some recently washed. They are all otherwise identical. I don't think we've recently lost any. Sometime's he's OK, but sometimes he's distraught because he can't find his muslin.
Any ideas?