I saw this great tutorial last year on craftster and I just spent about an hour trying to track it down again. Eureka! I found it! This particular tutorial is for blown eggs (you know, you make a pinhole and then rupture every vein in your cheeks blowing the entire egg out of that tiny hole?)
You wrap natural items gathered from your yard around the eggs, wrap pantyhose around them and dye them these wonderful rich brown tones using only onion skins and such.
I am going to give this a try and we'll see how it goes!