Totally non-crafty but in the spirit of recycling (and just plain getting the things out of the house), you can turn them into postcard/thank you notes. Just cut the outside (pretty part), off, flip it over on to the plain side, draw a vertical line down the middle (just like a postcard), write your message on the left side of the line and put the postage/address information on the right side of the line. Not only are you recycling the cards but you can use them as thank you notes for all the nice gifts you got. Plus postcard stamps are cheaper postage. I guess the only warning with this project is to make sure you mix up the cards so you're not using the "butchered" card someone sent you as your thank you note to them.
I take a container of plain yogurt and place it in several layers of cheese cloth (You could even use a clean piece of thin muslin, a linen napkin etc), and hang it over a bowl overnight *about 12 hours*. Then discard the liquid and put the thickened yogurt in a bowl, add salt, fresh black pepper, fresh garlic and whatever herbs you like (I usually use a bit of dill, fresh parsley, rosemary and a little thyme). Mix it up and refrigerate until ready to use. I have no idea what to call it *I always just called it herb cheese* and it's great with crudite' or smeared on good crusty bread.
I second that motion, I want to know more about buttermilk pie too. We used to make something called milk pie when we had extra pie crust and ran out of filling. You would take an unbaked crust and pour milk into it, add sugar, cinnamon, and a bit of flour (no measuring ever), and then bake until thick. It would make a sweet, cinnamon custard pie and I liked them better than the actual fruit pies etc. we actually set out to bake.
Use it as gifts bows for every gift you give until you run out! I have used it for gift ribbon/bows many times. I'm not terribly traditional with Christmas wrap so I always use plain, heavy silver paper and tie it with some unusual colored ribbon. Last year was pink and it looked really pretty with the silver paper.
I would paint the inside of the lids (each one a different color) and using small nails or strong glue, affix about 12 to 16 of them to a square board. Then you can put small trinkets, mementos etc. in the bubble part, push them back onto the lids and have a really cool shadowbox to hang on the wall.
Well, I'm not a med student but I am a cook and I can tell you that blood rots (as does anything organic), and when it rots it absolutely reeks. I wouldn't be surprised if you could could smell it right through a cork it's that strong smelling. I would also venture a guess that it would coagulate over time within a vial. If you're just going for effect I'd suggest something like slightly thinned enamel (nail polish even), as for the real deal? I can't see it working unless you had a way to add a preservative to it and seal it in something with no air.
I was thinking about the "sandwiching things in the plastic" idea as well. I was thinking of those huge flat sequins (no idea what they're really called), as well as the possibility of plastic stickers.
Hmm, I'd cut them up and weave them into something. Maybe coasters? Of course if you had piles of them you could maybe make a bath mat (though I think the short length of them would be a problem). Other than that, I don't know... the mother of all Chinese jump ropes?