Crystal Heart Science Experiment, Borax, Candy-Free Valentines

Crystal Heart Science Experiment

Borax Crystal Hearts.  A wonderful science experiment.  We love Candy-Free Valentines.  For more Valentines Crafts click here and here.  For fun candy – free card ideas, click here.
Borax crystals have been taking over Pinterest!  We finally tried it and had great results (the second time).  Our first try didn’t work because we didn’t have the correct ratio of Borax to water.
Supplies needed:
  • Borax – sold by the box in cleaning aisle of stores
  • Boiling water
  • Glass container – I used an old vase, but Mason jars would work too
  • Stick – anything you have works (pencil, chopsticks, ruler)
  • String
  • Pipe Cleaners
  • Food coloring (optional) – we died our solution a little pink/red for the above results.

Simple directions:

1. Make your design from pipe cleaners.
2. Attach the pipe cleaner to the stick with a piece of string.  This will allow the heart to dangle in the solution.
3. Mix boiling 1 pint of boiling water with 1/3 cup of Borax.
4. Lower design into the water.  Let it stay for 3 hours or overnight.
5. Dry and display.
For a really great example, clear photos and the science behind why it works – check out Club Chica. For more Valentines Crafts click here and here.  For fun candy – free card ideas, click here. Affiliate Links to Amazon.
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About Kristen

Kristen is a Reading Specialist who currently works with children in Kindergarten through 3rd Grade. She is the blogger behind Busy Kids Happy Mom, a site dedicated to fun, practical, and purposeful activities to do with your kids. Follow Kristen on Facebook, Pinterest, and subscribe for updates.


  1. this is awesome!!!!’. we have never done anything with borax before! this looks so easy! thanks!

  2. Great activity! Thanks for sharing!



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