It’s no secret that we’re really into salt crystals. We love making salt crystals because they are easy, take just a little while to make, and they illustrate so many fun scientific principles! With a single salt crystal, you can learn about salt molecules, ionic bonds, evaporation, molecule attraction, and the chemical properties of salt and water. There is a lot going on behind this super easy science experiment! For Easter, we decided to make salt crystal Easter eggs to round our our Easter STEM activities!
If you want to transform this science experiment into a STEAM project, hang your salt crystal eggs from a window or on an Easter tree!
Salt Crystal Easter Eggs
These crystal Easter eggs are a cinch to make, but they are the perfect bridge between science and the Easter holiday. Learn how to make them right here!
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What you’ll need to make salt crystal Easter eggs:
- Pipe cleaners (2 per egg)
- Mason jars (1 jar for each egg)
- Salt (1 regular-sized container per 4 eggs)
- A way to heat water
- Magnifying glass
First, boil enough water for all your mason jars. Our jars could hold two cups of water each, so we heated six cups.
Once the water boils, add in your salt. It takes about 1 cup of salt for each salt crystal egg. You probably can get the crystals to form with less salt (another good idea for a science project!), but they form a lot faster with over-saturated water.
When the salt starts to form a crystal on top of the water, you’ve added enough. Pour the water into jars.
Let the kids form egg shapes with the pipe cleaners. We used two pipe cleaners for each egg. This gave us enough to make the egg shape and leave a bit left over to suspend the eggs in the saltwater solution.
Use a clothespin to suspend the eggs inside each jar so that the eggs don’t touch the side or bottom of the jar.
Wait about 2-3 days for crystals to form. The longer you wait, the bigger the crystals will be!
Remove the eggs from the jars and trim the hanger with scissors. Dry the eggs on a paper towel. Don’t let the salt crystals get too wet or they will melt again.
When the eggs are dry, use a magnifying glass to inspect the crystals. My kids are always impressed at the rectangle shapes that salt crystals always make!
STEM/STEAM Elements in Salt Crystal Easter Eggs
Science: Use this project to teach evaporation, water saturation, density, chemical bonds, molecules, and chemistry.
Technology: It takes technology to boil water! Imagine how hard this project would be if you had to boil the water over a campfire.
Engineering: Kids will need to determine how much salt to use for their projects and what design to make their eggs. The more additions an egg has, the more crystals it will attract!
Art: The completed eggs make pretty decorations.
Math: Measuring and temperature measurement are used in this project.
More Easter STEM Activity Ideas