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9 Science Experiments for Kids with Salt

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We love easy science experiments you can do at home right in your kitchen with materials you already have. We have some kitchen science activity ideas. Today we put together fun and easy science experiments using salt. We all have salt at home, and it is inexpensive. All the activities listed here are fun and easy, and all you need are salt, ice, water, oil. Enjoy.

Salt Science Experiments with Water for Kids

Salt science experiments with surprising effects. Fun kitchen science activities at home

How to float eggs in water? This science experiment with salt also teaches kids why it is easier to float in ocean water.

I like how this experiment expand from the floating egg experiment, and visually show kids that salted water is heavier.

This colorful experiment further explores the density of salt vs. water, from a different angle. In addition to water and salt, kids also see that oil is lighter than water.

Salt Science Experiments with Ice for Kids

Do you have snow in winter? Why do we put salt down on the road when it snows? This salt and ice activity will show kids the reason.

This ice fishing activity also shows kids the salt melting ice effect, with added fishing fun.

Another way to show kids that salted water has higher freezing point, is to put a cup of water, and a cup of salted water in the freezer, and check back regularly every 10 minutes, and keep record on which one freeze first. More than likely, kids will see that the cup with just water freezes faster than salted water.

Salt Crystal Science Experiments for Kids

Have you ever grown your own salt crystal, and observe the shapes of the crystal? If you add some food color into the water, you are going to see a more beautiful outcome.

After growing crystal, you can then make a crystal sun catcher. Instead of regular salt, this one uses Epsom salt.

Salt Science Experiments Teaching Physics for Kids

I love this salt and popcorn science experiment. It is very easy to do. Just mix salt with popcorn before they are popped in a small glass bottle or a container that allows you see through what’s inside. You may find the result surprising. It was for me for the first time, as I guessed the salt will be at the top after shaking.

Salt Pendulum is a fun activity for kids of all ages. Ask kids measure the time that the pendulum bob swings from one end to the other, and predict what will impact the time? Will change the length of the string change the time? How about the weight, ie. the amount of salt to start with?

Kitchen science experiments to do at home with materials you already have in the pantry. Simple salt science activities: egg in salt water experiment, ice and salt experiment, growing salt crystal, salt water density demo, ... Learn scientific thinking with edible STEM project ideas to do at home or school or homeschool.

I hope you like these science experiments. Doing science at home is not just for fun, it is also to cultivate child’s interest in science and help them grow scientific thinking skills. I encourage you follow the scientific steps while working with kids on these fun activities. I outlined the steps and developed this Science Experiment Recording Sheet. I highly recommend using it, even with young children. They can draw pictures if they can’t write. It is the process that is important.


Looking for more kitchen science activities for kids? Try the 8 Fascinating Egg Science Experiments for Kids and 5 Pepper Science Experiments Kids Love.

For even more kitchen science activities, check out the 150 Kitchen STEM Activities for Kids.

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Love kitchen science experiments to do at home with materials you already have in the pantry. These simple science activities all just use salt: salt melting ice, growing salt crystal, salt water floating egg, salt water density demo, ... Kids not only learn salt attributes, but also scientific thinking, process, and methodology. Cool food STEM project ideas to do at home or school or homeschool.
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