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July 24, 2019 by Karen Jensen, MLS

Cindy Crushes Programming: DIY Galaxy Geode Bath Bombs

July 24, 2019 by Karen Jensen, MLS   Leave a Comment

I made galaxy geode bath bombs as one of the space themed programs for our Summer Reading Program. To make the bath bombs, I used this recipe but modified it for my group. Below is a step by step walk through of what we did and how it worked.

Supplies:

  • Food coloring (Blue, Brown, Purple, Pink or Green)
  • 1/4 cup of Citric acid
  • 1 or more tablespoons of rubbing alcohol
  • ½ cup baking soda
  • ¼ cup cornstarch
  • 1 tablespoon of coconut oil
  • Three sets measuring spoons
  • Disposable gloves, multiple pairs
  • Half a bath bomb mold (I used bath bomb containers from used bath bombs.)
  • Various mixing bowls/containers

To make the the outside edge of the geode

Working in groups of two people

Mix ¼ cup citric acid with ½ cup baking soda and ½ cup cornstarch.

Then add brown food coloring. I used brown food coloring gel. Use a couple of squeezes.

Then add 1 tablespoon of rubbing alcohol. You can add more as needed, but add slowly.

Mix the liquid and dry ingredients with your hands and be sure to wear gloves.

Press the mix on the edge of the bath bomb mold. Press hard to form a layer of one cm on the edge of the mold. Do this step while wearing the gloves.

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To make the inside of the geode

Again, working in groups of two people

Put three tablespoons of Epsom salt in to a bowl.

Squeeze a little food coloring in the bowl by hand wearing a new glove.

Repeat with a second color to get the galaxy look. Each color will need it’s own bowl.

Add a tablespoon of coconut oil into the solution. The coconut oil makes it stick together.

Place alternate colors in the mold starting at the center and moving upward. This will give it the galaxy effect. If you want more of a geode effect, just use white Epson salt on the edge with coconut oil and add colors afterwards.

This bath bomb should be left out to dry or put into the freezer to dry.

Final Thoughts: This was the best bath bomb I have ever made. I really enjoyed it.  There was extra mix so I rbought in my extra Easter eggs to use as container for the leftover supplies in the bowls.

Filed under: Teen Programming

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About Karen Jensen, MLS

Karen Jensen has been a Teen Services Librarian for almost 30 years. She created TLT in 2011 and is the co-editor of The Whole Library Handbook: Teen Services with Heather Booth (ALA Editions, 2014).

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