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How to Grow Crystals Science Experiment

As a homeschooling mom I am always looking for fun, easy science experiments for kids that make kids go WOW! These colorful crystals are such a fun crystal science fair projects for at home or school. I will show you step-by-step how to grow crystals with your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students.
As a homeschooling mom I am always looking for fun, easy science experiments for kids that make kids go WOW! These colorful crystals are such a fun crystal science fair projects for at home or school. I will show you step-by-step how to grow crystals with your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. 

How to grow crystals

This crystal science experiment is super easy and FUN for kids of all ages to try. Let me show you how to make salt crystals with just a few simple materials and only 20 minutes to set-up.  Over the next 1-2 weeks your crystals will grow and your preschoolers, kindergartners, grade 1, grade 2, grade 3, grade 4, grade 5, and grade 6 students will be amazed! Ready to try this science project with how to grow crystals at home.

How to make salt crystals

For this crystal growing science project all you need are a few simple materials:

  • Coal (like you use on a bbq grill (I’ve heard cut up sponges will work too)
  • Water in a squirt bottle
  • 3 tablespoons uniodized salt
  • 3 tablespoons ammonia (smells really strong so please use in a well ventilated area with the help of an adult)
  • 6 tablespoons bluing
  • morton salt (regular table salt)
  • liquid food coloring (simple stuff you find in the cake aisle is what we used)
  • glass pie pan to hold your crystals

Science Experiments for Kids

How to grow salt crystals

Day 1 – Put coal (or cut up sponges) on a pie plate. Spray the coal until it is moist, but there is not any extra water on the bottom.
How to Grow Crystals

Mix together: 3 tablespoons uniodized salt, 3 tablespoons ammonia (smells really strong!), and 6 tablespoons bluing. Stir until the salt is dissolved.
getting ready to grow crystals
Pour the mixture evenly over the coal. Add a little water, stir, and pour the remaining mixture onto the coals. {You can see 2 year old Tinker Bell was fascinated with what was going on too!}
our fun homeschool science

Put drops of food coloring over the coals. {Areas without food coloring will be white.} Sprinkle with 2 TAB more of salt.

adding food coloring to dye the crystals
Put your crystal garden somewhere where it will not be disturbed.

crystal growth day 2

Day 2 – There are already some small white crystals growing.

crystal growth day 3

Day 3 – You have some very pretty and delicate crystals forming. You can be done at this point if you are satisfied or you can crank it u a notch and watch the crystals start to grow like CRAZY! Pour an additional mixture of 2 Tablespoons ammonia, 2 Tablespoons water, and 2 Tablespoons bluing in the bottom of the pan, careful not to disturb the delicate crystals. This will get pulled up through the coal as a food source.

crystal growth day 12

Crystal science fair projects

By day 12 our coal had all but dissapeared into large growths of crystal. We should have added more food coloring the 2nd time to get more colored formations. Instead the colored crystals started to get burried by large white, cauliflower looking crystals.

Have your children use a magnifying glass to observe the crystal up close. Pull off a piece and analyze what it feels like. Is it still delicate?

Now make sure to wash your hands with soap and water, throw out your project, and wash the pan and surface carefully.

Ready for your next fun science project? Check out these fun ideas below!

100 Amazing Food Experiments for Kids - so many clever edible science projects for kids of all ages to explore chemistry, biology, physics, and earth science! #scienceexperiment #scienceproject #kidsactivities capillary-action-science-experiment-for-kids DIY Lava Lamp - super easy way to make your own lava lamp with simple things you have around your house. This homemade lava lamp is such a fun science project for kids of all ages to sneak in some summer learning. This science experiment is for toddlers, preschoolers, pre k, kindergarten, first grade, 2nd grade, 3rd grade, and kids of all ages at home, homeschool, summer camps, classroom, etc. Help kids learn about the impact of pollution and the importance of protecting our earth and environment with this pollution experiment for kids. This simple acid rain experiment is great for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grde, 4th grade, 5th grade, and 6th graders. All you need are a few simple supplies ot try this flower experiment where children can see first hand the impace of acid rain on plants.Use this water pollution experiment for kids as part of earth day science or earth science experiment.

Science for Kids

Looking for lots more fun, science experiments for kids? You will love all these fun, creative and easy science experiments for elementary age children:

This amazing color changing slime is going to blow your mind! This heat sensitive slime will actually change color as your kids touch it because it is heat sensitive! This is a super cool project for kids you MUST TRY! Must try summer activity for kids to add to their summer bucket list  Help kids learn about what is under their skin with this fun, interactive, and hands on human body project for kids from toddler, preschool, pre k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. This can be a simple life size human body project or use our free printable templates to add bones of the body, organ templates, and more. This engaging science project is EASY and LOW PREP too.  dying flowers science experiment

Science Experiments for Kids

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com

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