Take science outside with an easy SANDBOX VOLCANO! When the weather is nice, try simple summer science experiments outdoors for a real hit with the kids. From pulleys to homemade ice cream, to bursting bags, this baking soda vinegar volcano is one of the coolest and easiest science activities for kids this season.



Baking Soda Volcano Experiments

We love all things that erupt and have been exploring different ways to create eruptions while having fun through play. Baking soda and vinegar science experiments are fantastic for kids of all ages!

Here are a few of our favorite volcano eruptions…

When the weather is nice, doing your science activities outdoors is an awesome idea! Building a sandbox volcano is an outdoor science activity with a quick clean-up.

What we love about these science activities is the extra play factor that is organically included. You can see what I mean at the end of this post.

Watch the Volcano Video

How Does a Volcano Erupt?

Well, it’s not because of baking soda and vinegar! But it is due to escaping gasses and pressure. You can use a homemade volcano with a baking soda and vinegar chemical reaction to mimic the gas produced in a volcano. Baking soda and vinegar are the best ingredients for a simple volcano eruption!

The chemical reaction produces a gas (read more about how it works further on) which pushes the liquid up and out of the container. This is similar to an actual volcano where gas builds up underneath the earth’s surface and forces the magma up through the hole in the volcano, causing an eruption.

Some volcanoes erupt with an explosive spray of lava and ash, whereas some, like the active volcano in Hawaii, the lava flows out the opening. It all depends on the shape and the opening! The more confined space, the more explosive the eruption.

Our sandbox volcano is an excellent example of an explosive volcano. Another similar example is our Mentos and coke experiment.

Read more about the science behind baking soda and vinegar experiments.

Grab This Free Volcano Facts Pack.

Add cool volcano facts to your sandbox volcano demonstration with this free activity pack. Click here for your volcano facts pack.

What is the scientific method?

The scientific method is a process or method of research. A problem is identified, information about the problem is gathered, a hypothesis or question is formulated from the information, and the hypothesis is put to the test with an experiment to prove or disprove its validity. Sounds heavy…

What in the world does that mean?!? The scientific method should be used as a guide to help lead the process. It’s not set in stone.

You don’t need to try and solve the world’s biggest science questions! The scientific method is all about studying and learning things right around you.

As kids develop practices that involve creating, gathering data, evaluating, analyzing, and communicating, they can apply these critical thinking skills to any situation. Click here to learn more about the scientific method and how to use it.

Even though the scientific method feels like it is just for big kids…

This method can be used with kids of all ages! Have a casual conversation with younger kiddos, or do a more formal notebook entry with older kiddos!

Easy Baking Soda and Vinegar Volcano

Also, look at our salt dough volcano project as a fantastic alternative!


  • sandbox with sand (try our sand slime or sand foam too)
  • water
  • baking soda
  • vinegar
  • 16oz water bottle
  • food coloring (optional)

You can also try adding dish soap for an even foamier fizzing eruption. Just a few drops are all that is needed.



STEP 1. Fill the water bottle about a third full (mix in optional food coloring) and add about 5 teaspoons of baking soda to it. Put the water bottle cap back on until you are ready.

STEP 2. Build a sand mountain or sand volcano around the bottle.

sandbox volcano set up with water bottle and mountain makingPin

STEP 3. Uncap the bottle and pour a good amount, probably a cup of vinegar into the bottle.

Quick, get out of the way and watch the huge eruption!

sandbox volcano major eruption with baking soda and vinegarPin

Try These Additional Volcano Project Ideas

If you don’t want to use baking soda and vinegar, here are a few other ways to produce an eruption.


More Fun Fizzing Experiments

There are many ways to explore fizzy reactions and not just with baking soda and vinegar experiments!

More Helpful Science Resources


It is never too early to introduce some fantastic science words to kids. Get them started with a printable science vocabulary word list. You will want to incorporate these simple science terms into your next science lesson!


Think like a scientist! Act like a scientist! Scientists like you and me are also curious about the world around them. Learn about the different types of scientists and what they do to increase their understanding of their specific areas of interest. Read What Is A Scientist


Sometimes the best way to introduce science concepts is through a colorfully illustrated book with characters your kids can relate to! Check out this fantastic list of science books that are teacher approved and get ready to spark curiosity and exploration!


A new approach to teaching science is called the Best Science Practices. These eight science and engineering practices are less structured and allow for a more free**-**flowing approach to problem-solving and finding answers to questions. These skills are critical to developing future engineers, inventors, and scientists!

Printable Science Project Pack with 52+ Experiments

Templates, instructions, observation sheets and more for over 52+ science projects and experiments. Perfect for kids in Kinderaten through Middle School.


  1. We did not have a problem with it. If you are concerned you can scoop out the used sand or you could put a bin inside the sand box and have kids build the volcano inside it.

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