Because they are so small, I bet you could dehydrate them and have them become preserved for craft use. I think you would have to be careful to ensure they are used only in a dry environment afterwards, because if they pick up moisture again they might get rotten and smelly.
If you have a food dehydrator it should be a snap to do this -- I'd set it on a medium to high heat and let them go. Probably going to take 24 hours minimum, if not a lot longer.
You could possibly try drying them in a low oven and see what that does. Another possibilty since it's summer is try putting them someplace naturally very hot and drying like an attic or perhaps inside a car parked in the sunshine all day.
I think you should wash them in either a degreasing detergent like Dawn or with isopropyl rubbing alcohol first to remove the cuticle -- this layer naturally helps seal the moisture in the egg, and if you remove it they should dry faster. Finally, it probably couldn't hurt to dip the in a bleach solution first to kill off any surface bacteria so they don't get in there and make it rot during the process.
Good luck. Let us know if it works.