This would be such a cute idea for Easter. Here are the directions that I copied from Martha Stewart:
Tools and Materials
Large or extra-large raw eggs
Glass or enamel pot
Pieces and scraps of 100 percent silk -- including cut-up silk ties, blouses, or boxers -- large enough to cover an egg
Squares of undyed cotton or pieces of old white sheets, pillowcases, or tablecloths that are large enough to cover silk-wrapped eggs
3 tablespoons white vinegar
Tongs or spoon
Silk-Dyed Easter Eggs How-To
1. Cut silk into pieces large enough to wrap around a raw egg.
2. Tightly wrap a raw egg with a piece of silk, making sure the printed side of the material is facing the egg. Secure with a twist tie.
3. Place the silk-wrapped egg in a piece of undyed cotton and secure tightly with another twist-tie.
4. Place egg(s) in an enamel or glass pot. Fill the pot with enough water to cover eggs completely. Add three tablespoons of white vinegar to the water.
5. Bring water to a boil, turn heat down, and simmer for 40 minutes or longer.
6. Remove eggs from water with tongs or spoon, place on a cooling rack, and let cool.
7. Remove silk from cooled egg.
8. For shiny eggs, wipe with a paper towel dabbed in vegetable oil.