In order to do this project I needed hollow eggshells.
The best how-to explanation I could find was at Martha Stewart.
The necessary tools are something with which to poke a hole (I used an Exacto knife), something to break up the egg yolk (I used a paper clip), and something to blow out the egg (I used an ear syringe).
First poke holes in each end of an egg with a pointy object. If you use a blade, after the hole is started continue gently or the egg will crack.
One hole should be larger than the other.
Using an unbent paper clip inserted in one of the holes, I broke up the yolk.
Place the syringe on the large hole (it need not be inserted in the hole) and gently squeeze. (You can also blow on the hole with your mouth if you don’t have a syringe.)
The white and then the yolk will run out the smaller hole. At the beginning the liquid might come out both holes.
Wash off the egg and let it dry. Now it’s ready for your project.
Who’s your DIY guru?