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Easy Explosive Pumpkin Volcano Experiment

You’ve probably already tried the classic volcano experiment for kids, but during the fall, we like to transform our science classroom into a fall haven filled with fall science experiments and STEM activities for fall 

This time, we decided to transform the classic baking soda and vinegar volcano into a pumpkin volcano!

The kids were thrilled with the science experiment, and everyone had a blasts learning about chemical reactions and pumpkins.

How to make a volcano inside of a pumpkin! Turn the classic baking soda and vinegar experiment on its head with this fall-themed pumpkin volcano!

Thrill your students and follow Next Generation Science Standards at the same time when you make this exciting pumpkin volcano!

Pumpkin Science NGSS Application

This experiment can be used to meet the following NGSS standards:

The pumpkin science volcano experiment is a fun twist on a classic experiment that wows every time! Use it in the classroom or at home for science learning and fun! #stemed #stemactivities #scienceexperiments #scienceforkids #fallactivities

NGSS standard 5-PS1-4

Conduct an investigation to determine whether the mixing of two or more substances results in new substances

NGSS standard MS-PS1-2

Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

NGSS standard MS PS1.B

Substances react chemically in characteristic ways. In a chemical process, the atoms that make up the original substances are regrouped into different molecules, and these new substances have different properties from those of the reactants.

The fun never stops with a pumpkin volcano activity. Explore pumpkin science with this pumpkin science activity and keep the learning going all season long! #stemed #stemactivities #scienceexperiments #scienceforkids #fallactivities

 NGSS standard K-2

Plan and conduct an investigation collaboratively to produce data to serve as the basis for evidence to answer a question. (NGSS standard 2-PS1-1)

Analyze data from tests of an object or tool to determine if it works as intended.  (NGSS standard 2-PS1-2)

Make observations (firsthand or from media) to construct an evidence-based account for natural phenomena.  (NGSS standard 2-PS1-3)

Construct an argument with evidence to support a claim. (NGSS standard 2-PS1-4)


If you can’t get enough of pumpkins this fall, try a volcano science experiment in a pumpkin! It’s so much fun and there is a lot for kids to learn, too! #stemed #stemactivities #scienceexperiments #scienceforkids #fallactivities

The classic baking soda and vinegar reaction works because baking soda is a base and vinegar is an acid. When these two substances mix, they create a chemical reaction that releases carbon dioxide gas.

This is a form of endothermic reaction, because it uses more energy than it produces.

The carbon dioxide gas gets trapped in the remaining water and dish soap, making foamy bubbles that are fun to watch for kids.

When the pH of the mixture has stabilized and the conversion is complete, the mixture stops reacting and the bubbles deflate.

Adding the dish soap makes the reaction last longer, because the soap bubbles hold air longer than the liquid vinegar alone.


How much fun will the kids have with this pumpkin volcano? This fun pumpkin science experiment is perfect for a Halloween party activity or fall party activity for kids! #stemed #stemactivities #scienceexperiments #scienceforkids #fallactivities

The classic volcano experiment for kids becomes new again when you put it inside a pumpkin! Here is how you can make your own pumpkin volcano.

Use our science experiment worksheet to record your results from this experiment.

Follow along with these instructions to make your own pumpkin volcano!


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fall stem challenge cards


You’ll want to open up your pumpkin in advance and remove the guts if you’re using a real pumpkin. If not, you may want to go ahead and cut the top off just so you don’t have to have knives in class.

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Fill the inside of the pumpkin with vinegar. Place the pumpkin on a tray or plate.

Dye the inside of the pumpkin red with the food coloring.

Add a few drops of dish soap.

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Add baking soda to the pumpkin and watch the reaction happen!

Keep adding baking soda until the bubbling stops.

fall stem challenge cards

More Fall Science Experiments

Sticky, Oozy Fall Leaf Slime That Will Make You a Slime Fan

13 Fall Chemistry Experiments for Kids

Easy Fall Science Activities for Elementary Students

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