1. I like to gently wash my eggs first in mild soapy water to clean the exterior and allow the egg to dry. If you have clean eggs and clean tools, you can eat the contents of the eggs after blowing them out. Egg yolks and whites can be safely saved for 2 days in the refrigerator.
2. Next, gently but securely hold the egg in the palm of your hand and poke a small hole in the top & bottom of the egg using a straight pin. It is helpful if you twist the pin a little rather than forcefully poking it through. Then enlarge the hole with a very small drill bit twisted by hand into the hole
or by slightly 'chipping' away around the hole.
3. Take a paperclip and unfold it. Poke this into one of the holes and gently scramble the contents so it will come our easier.
4. Now you want to blow out the contents into a clean bowl. I originally just blew with my mouth over the hole and the contents came out the other end. I have also tried using an infant bulb syringe places over the top hole to 'blow' air into the egg and the contents out. Both methods work fine. It depends on if you are squeamish about eggs or if you have a bulb syringe.
5. After all the contents are out, I like to run a little warm tap water into the egg, swish it around and blow it out to remove anything that might stink later.
Depending on the picture you are creating, you may need to allow the egg to dry in between colors. For instance in the egg pictured below, I painted the background, allowed the paint to dry then added the butterflies.
The best way to store the eggs is in an egg carton, Styrofoam or paperboard. The lids on mine don't close because of the pins on the top of some of my eggs, so I use a rubber band to secure the lid down. Even with these precautions, I have broken two eggs; two of my favorites, Starry Night & my daughter's birthday egg. I haven't gotten around to replacing them yet. Maybe this is the year! A friend also gave me an extra large duck egg (it was abandoned) that was beautiful just by itself. Keep in mind how you will store the extra large eggs if you choose this route.