Can you identify this part? (Lego themselves couldn't)
This is most likely Scala Jewelry Plate, Modified 2 x 2 (Human Bracelet segment).



Quite easy for me to find on Bricklink's search engine. All I did was type "plate 2x2 modified." Bricklink tells it appears in four sets which look like bracelet kits, but as of now it's too late to use them as bracelets because Lego has already invented newer ones. You might as well use these as a bridge or something.