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Egg Crystals

posted Feb 27, 2011, 10:00 AM by K Day
We found this really cool experiment at Roots and Wings Co. It's pretty simple and straightforward with huge results. I would encourage parental participation, especially depending on age and ingredients being mixed. 
Here's what you'll need:
    • Empty Egg Shells (We rinsed ours out and removed the membrane inside.)
  • Very hot or boiling water
  • Water Soluble items from around the house (Baking soda, salt, sugar, etc.) 
  • Food Coloring
Add water soluble ingredient(s) to water and stir until completely dissolved. Add food color and pour into egg. Viola, now you can make Egg Geodes too! 


Step 1 - Gather your clean and empty eggs. 

Step 2 - Gather all your ingredients so you have them ready to mix :) We used Sprinkles, Sugar, Baking Soda, Vinegar, Laundry Powder, Baking Powder, Meringue Powder, Vanilla, Honey & Cinnamon. We mixed each ingredient with hot water in a measuring cup and then poured the mixture into an egg. Be sure to clean the cup and any other utensils each time so you don't mix ingredients!  


The Baking Powder gave us the most exciting results :) When we mixed the baking powder with the hot water, it foamed & fizzed. A LOT! See the picture of the reaction in the measuring cup? It also kept fizzing in the egg for almost 2 HOURS! So cool! Can you see the fizzing in the blue egg picture below? (The white stuff is the fizzing)


The yellow egg in the picture below is our Salt Water Egg. In only 90 minutes we started to see crystals form. Some of the crystals are hard and some are soft. 


The orange egg (below) has a baking soda solution. The green egg (below) has a vinegar solution. We used 1/4 cup vinegar & 1/4 cup hot water. Both have begun to grow crystals in about 90 minutes. Taka' noticed that the vinegar egg has a bit of foam on top and some bubbles on the bottom. 

Check back in a few days for updated photos of our crystals! 

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