We began by lightly cracking open 4 eggs near the smaller end of the egg. We poured the eggs into a bowl to use later. We then cleaned the insides of the eggs out with warm water, making sure to get the all of the slimy membrane out to prevent molding. NOTE: you want to keep as much of the egg intact as possible for better growth of the crystals.
Next we used a 1/4 cup measuring cup and filled it about 3/4 of the way full of hot water, not boiling. Then we began adding tablespoons of the Epsom Salts, stirring as we made each addition, until the salts no longer dissolved.
Add a few drops of food coloring to each egg. I would suggest leaving on egg without food coloring to show a more natural crystal.
Place the eggs in the refrigerator for 3 hours.
If there is any liquid still in the eggs after 3 hours CAREFULLY pour it out, making sure you don't pour out any of the crystals. If you do not have crystals then your water was not warm enough, try again.
DISCLAIMER: We did not develop this experiment. We used instructions from The Happy Scientist.
Place 2 cups warm water in a pot and add food coloring.
Add Borax until the water is super saturated.
Once the water starts to boil remove from heat and add the solution to the egss.
As the water evaporates from the eggs, borax crystals will deposit on the sides of the egg crating a geode egg.