11 Useful Things You Probably Didn’t Know You Could Do With Eggshells


After cleaning out the shells, coat the inside with glue and alum powder, then let them dry overnight. Mix up boiling water, alum powder, and food coloring in a jar and let that sit for about 30 minutes. Drop the eggshell in and carefully push it down with a spoon until it’s submerged. Leave it overnight, then in the morning pull out your geode. What a cool science project! Learn more here.

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