Mason did a science project to see what grew crystals better: Alum, Baking Soda, or Borax. We poked a hole in the eggs, blew the egg yolk and stuff out, cut the egg in half, painted glue inside, then covered the inside with alum, baking soda, or borax. After they dried we created a mixture of boiling water and either alum, baking soda, or borax, added food coloring, and then soaked the eggs in them overnight to create the crystals. The Alum seemed to create the coolest crystals!!
The baking soda bubbled up quite a bit!
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