Easy DIY Volcano Slime Recipe that Really Erupts!

If you can’t tell already, we’re HUGE slime lovers here. We’ve tried over 100 slime recipes.

Today, we thought we’d mix science and slime and make this slime-a-fied version of the classic baking soda and vinegar volcano science experiment for kids, making a slime volcano!

It was tons of fun making this slime, and my kids thought it was the coolest thing ever.

We even made a little video of our volcano so you can watch the slime volcano eruption in person, even if you don’t make your own version of this recipe!

It was so much fun watching the kids have fun with an experiment that they have done at least 50 other times. Adding the slime element made our science experiment volcano new and fun again!

If you love this erupting volcano slime recipe, you’ll also love our rainbow slime recipe, galaxy slime recipe, and tie dye slime recipe.

You’ll also want to check out the ultimate list of summer STEM activities and the ultimate list of summer science experiments. 

Check out the full list of summer slime recipes!

How to Make Volcano Slime

If you can’t get enough of this volcano slime recipe, you won’t want to miss checking out our other list of science fair project ideas!

How Do I Do the Slime Volcano Experiment?

Slime is usually very drippy and wouldn’t do well in a volcanic shape. But this version is drier, making it similar to clay, which is ideal for transforming into a working volcano!

Recreate the extinction of the dinosaurs when you make you very own fluffy volcano slime.

Kids will go nuts for this project, and you’ll have fun with it too! Make this volcano slime at home, or you can let your child take it to school as as classic science fair project.

CLICK HERE FOR THE ULTIMATE FLUFFY SLIME RECIPE!

Turning a Slime Volcano into a Slime Volcano Science Project

Slime itself is stretchy, fun, and provides positive sensory input. Something about stretchy, squishy slime is soothing to the soul, and playing with slime is satisfying.

However, slime can be a lot more than just a sensory experiment or something that looks cool. You can turn a slime volcano into a slime volcano science project!

While doing this project, kids will learn about polymer chains, chemical reactions, endothermic reactions, acids and bases, the scientific method, and you can even use the experiment to explore volcanos and how they are formed and influence the landscape and climate around them.

Turn it into a science project by testing variables with the slime or the volcano mixture!

How to Set Up the Volcano Slime Science Fair Project

Volcano slime is actually easier to make than you might think! 

The key to making good slime volcano is to make sure you don’t make the slime too runny or else it will slide right off your jar!

Troubleshooting Your Volcano Slime Recipe

The key to this volcano slime recipe working is to make it drier than traditional slime. This will help the slime stick around the jar and make a real volcano shape, rather than just melting down the sides too quickly.

Follow our steps precisely and your experiment will go off without a hitch.

Use our science experiment worksheet as you build this volcano, so you can transform your slime experiment into a full blown science experiment suitable for any elementary science project.

And if you have fun with this recipe, you may also want to try making  borax slime and laundry starch slime.

What ingredients do you need to make a volcano erupt?

Here’s what you need to make a slime volcano that really erupts.

For this recipe you will need:

• Green Easter gass
• River rocks
• Mason jar
• Duct tape
• Cardstock paper
• Dinosaurs
• Shaving cream
• Borax
• Food coloring
• Large tray
• Baking soda
• Vinegar
• Dish soap

How to Do the Slime Volcano Experiment

Follow along with these instructions and learn how to make a working volcano from slime!

Set Up the Slime Volcano Base

Start by placing your grass and stones on the tray. Leave a spot empty for the volcano.

Make a cone from paper and wrap it around the top of the jar to make the volcano shape.

Fill the jar half-way with vinegar. Add red food coloring and a few squirts of dish soap.

Place the cone over the jar and tape in place using duct tape. Cover the entire cone in duct tape to strengthen it.

Place the jar in the center of the tray.

Arrange your dinosaurs around the volcano.

How to Make Fluffy Volcano Slime

This recipe is a modified version of our fluffy slime recipe. 

Mix two teaspoons of borax powder in a jar filled with water. Stir to dissolve.

In a large jar or bowl, mix 2 cups of glue, 2 cups of shaving cream, and some black and brown food coloring.

Pour half of the borax liquid into the jar and stir.

Once the slime starts to form, remove it from the jar. If it is still sticky, add a bit more of the borax water. You want the slime to be stretchy and pliable, but also firm and dry.

Flatten the slime until it is as wide as your volcano.

Drape the slime over the volcano and let the slime slowly pull down the sides of the volcano.

Open a small hole in the top of the volcano.

How to Make a Slime Volcano Erupt

When you’re ready to make the volcano erupt, add a couple of teaspoons of baking power inside the volcano.

Watch as the mountain erupts over the top of the volcano and into the tray below.

Keep adding baking soda one scoop at a time until the eruption stops.

Other Volcano Eruption Experiments for Science Fairs

Colorful Snow Volcano Experiment Using Real Snow

Pumpkin Volcano Experiment for Kids

Classic Baking Soda Volcano Science Experiment

Sand volcano

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