I took a plain white egg and made two small holes top and bottom and blew out the innards.
The theory is you blow hard through one hole and the yolk and white will come out of the other hole! It works!
Step 1: Let the egg dry out!
When the egg was dry and fresh smelling, I painted it with a coating of white acrylic paint! A skewer through one of the end holes of the egg and the other end in a bottle is a good way to paint your egg without getting your fingers covered with paint.
I gave the egg three coats of the white acrylic, which made it stronger.