No Fabric. No Thread. No Lace. No Ribbon.
No Paper. No Books.
Also no Fur. No Feathers. No Taxidermy. Though Yes to glass eyes.
So ... optical lenses, opera glasses, microscopes, telescopes, and magnifying glasses are all out of the question.
A well loved doll or bear with glass eyes? No.
Do the glass eyes belong to a vintage Steiff or other manufacturer's cat? No, though a vintage Charlie would be lovely.
A giant glass eye from an optician's window display? I would loooove one of these, but haven't found one for my collection yet.
Pair of glass eyes for teddy bear or taxidermist? No, though I have lots of those, and love them.
Stereoscope card viewer? No.
So ... we are back to glass eyes, but they are not on their own.
We also have some sort of animal connection or classification, but not an animal part or part of an animal.
Think outside the box. Animal-related but not an animal ...
And we are missing some materials ...
That's enough hints for this morning - next update in the evening!