What do you hold on to after foster child leaves?

Clothes that I bought for a certain child, but which they outgrew while in my care, I keep. I find myself dressing BB Kiddo in 6m clothes I've just unpacked from storage and having smiley reminders of "This was The CooCoo Pigeon's monkey shirt!" or "The Supermodel Diva Baby had her portraits taken in this dress." It's funny, but I do associate certain clothes with a specific baby even though several babies have worn them.I did not keep anything of Little Miss This's, except for photos. I found a couple of pacifiers in the following months, but the worst grief-bomb I found was when I put on my winter coat for the first time this fall (she left in July), and found her mittens in my pocket. In the end, I made one into an ornament for our Xmess tree by embroidering her name on it and adding a pretty bow. I purposely didn't keep anything of hers that could become talismanic; I could drive myself crazy with that.I have a Pandora-type bead/charm bracelet with beads representing all my kiddos (bio and foster); after I add the bead for The Mini Melonball I will have to start a second bracelet!