Explore Science with these DIY Crystal Geodes

Explore Science with these DIY Crystal Geodes

What do diamonds, salt and sugar have in common? They’re all crystals! Your child can see the crystallization process in action by creating these simple DIY crystal geodes.


  • Glass mixing bowl
  • Small bowl
  • Boiling water
  • Salt
  • Food coloring
  • Half an eggshell


  • Fill a glass bowl with boiling water.
  • Add a generous amount of salt and stir until it stops dissolving.
  • Add a few drops of food coloring and stir.
  • Place half an eggshell in a small bowl.
  • Fill the small bowl with salt water solution.
  • Let soak for 3-7 days.
  • Observe the salt particles crystallize on the eggshells to create beautiful geodes!

If you enjoyed this activity, check out more science activities for kids.

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