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Valentine’s Day Crystal Growing Heart Science

By February 9, 2018October 1st, 2018No Comments

Grow heart-shaped crystals for Valentine's day! Heart science, valentine science for kids.

Crystal Growing Heart Science

Love is in the air here at Green Kid Crafts! Actually, it’s in jars, growing beautiful crystals in the shape of hearts. Just like our previous crystal growing science projects, you’ll find this heart science experiment to be a big hit with kids. If you haven’t checked out our crystal growing posts, make sure you head over to learn how to grow snowflake crystals and pumpkin crystals.


  • Pink or red pipe cleaners
  • String
  • Popsicle sticks
  • Borax
  • Water
  • Mason jars
crystal growing heart science


crystal growing heart science
crystal growing heart science
1. Make heart shapes out of pipe cleaners.
2. Tie the pipe cleaners to a popsicle stick with the string.
crystal growing heart science
crystal growing heart science
3. Boil water and carefully pour it in the mason jars.
4. Add in 3 tablespoons of borax per cup of water and stir until completely dissolved.
crystal growing heart science
5. Once the water is clear, put the shape in water and hang on the jar by a popsicle stick.
crystal growing heart science
6. The crystals will be fully formed within 24 hours. You’ll probably start seeing some crystals appear within 4-5 hours. After a day you can take the hearts out of the water and enjoy! But feel free to leave them in longer too!
crystal growing heart science

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