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Any ideas?

I received an old collection with a few items I can’t figure out. Here are a few of the small ones, can anyone help? Please and thank you!
(I think the first one is phalanges possibly but of what? The next box? And the last one is definitely a large tooth, but no clue to what?)B83C6631-B4BB-47FC-9BAF-9C0EF9B321DB.jpeg6A4A1AD1-8CB2-4947-BFF5-BB78BB168B26.jpegDC929CD6-BC21-4844-AB2D-D882EF7F3DFD.jpeg