What about using them as backs for quilts? You would not need any batting because they are warm enough. You could also make a “scrap” blanket; if you have a serger and use a decorative thread it can make something beautiful; you do not mention the pieces sizes, what about some baby quilts? Some hospitals accept really small quilts to use on the maternity ward; some mothers loose their babies – fetus in reality – that are formed enough for mothers to hold them; instead of having the fetus wrapped in gauze or cotton, they can use something nicer; even 12”blocks with just a back can do; obviously they do not need batting... Hope you do not think of this as a cruel way to “talk” about such a sensitive subject because it is not my intention. But any 10” to 12” square of baby colors would do.
If I try, I probably can find a few more ideas…
Lucia