Science In a Shell: Egg Geodes

Cool science experiment all in an eggshell! Here is an experiment to introduce the scientific method and create egg geodes. Compare the reactions of sea salt, borax and kosher salt using color to bring out the captivating results of this science experiment.

Science In a Shell: Egg Geodes


Geodes in an Eggshell – Science Experiment

This multi-day science experiment uses eggs, rock and sea salt, borax baking soda and food coloring. Using clean eggshells with just the tops taken off, create solutions of the ingredients with a couple drops of food coloring. Leave the solutions poured into the shells for a few days. Observe and record the changes as your experiment continues.


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Leslie {aka the original Teach Junkie} loves learning new things to make teaching easier and more effective. She enjoys featuring creative classroom fun when she's not designing teacher shirts, making kindergarten lesson plans or planning her family's next trip to Disney World.