Puking Pumpkin Volcano Experiment!

This Halloween, let’s make things a bit less spooky, and a bit more pukey.  Follow our guide, and you’ve got yourself a pukin’ punkin.  Or, for the easily offended, a pumpkin volcano.  Which is throwing up.  But hey, it’s Fall, it’s almost Halloween, and we’re homeschoolers, so we have to find a way to make this weird educational.  However, since this is a family blog, we’re going with the volcano option.

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Now, to achieve the proper pumpkin volcano, you will need a few things:

  • Baking soda.  
  • Vinegar.  Which is amazingly hard to spell for such a simple word.
  • Food coloring.  Specifically yellow and green food coloring.  To properly make the… lava color.
  • A pumpkin.  I cannot stress this enough.  If you combine your ingredients in nothing, you’ll just have a mess.  Instead of a glorious mess.
  • A knife.  
  • One of those flimsy pumpkin saws that you have to re-buy every single year because they’re so flimsy.  But you can’t just buy the saw, which is all you really want.  You need to overspend on a kit with a book of patterns that you won’t even use because if you actually even try they don’t fit on the pumpkin anyway plus a whole pack of plastic instruments of torture that you can’t figure out how to work.  What, am I a pumpkin dentist?  Do I need to perform a pumpkin root canal?  Can I charge as much as the actual dentist charges?  In that case, I will go out and buy like, twenty of those kits right now.
  • Umm… there wasn’t much of anything else, but I just really wanted seven bullet points, so… outside?  Yeah, outside.  Because it’s really messy.  So don’t do this if you don’t have an outside, or like a bathtub or something.  
Now that you have all of your ingredients together, it’s time to make that pumpkin volcano that’s going to throw up. 
Carving Your Pumpkin

First off, you need to carve the pumpkin.  If you want a proper vomiting effect from your volcano, you should carve the mouth a little bit bigger, and the eyes and nose a bit smaller.  However, you don’t want to make the mouth too big.  Then the foam won’t come out of the top, and what kind of volcano doesn’t have lava coming our of the top?  One that’s throwing up, that’s what.  

The Experiment

After your pumpkin is properly carved, you need to add the ingredients for the lava,  I tried a couple of different ways, such as pre-mixing everything.  Turns out this doesn’t really work.  So, put ten drops of yellow and one drop of green food coloring to get your proper puke green lava color.  Right into the pumpkin.  Then pour some baking soda into the pumpkin.  This is very important.  Make sure you add exactly some.  Okay, honestly, it’s going to vary based on the size of your pumpkin, but as you can see in our video, we did several different tries (three, to be exact,) and I used about a half a box of baking soda.  On the other hand, I used the entire bottle of vinegar, so you will need more of that than you expect.  So add your bacon soda, then add some dish soap.  Oh yeah,  you need dish soap.  I guess that could have been the seventh point.  A tablespoon or two of dish soap will do it.  Don’t mix anything, don’t stir anything, just pour a cup or so of vinegar into your pumpkin, and it will start puking its guts up erupting like there’s no tomorrow.  Attempt two in the video shows the result of this method.  It was quite successful, and also really gross.  Because volcanoes are gross.  


And there you have it.  No need to over-complicate things.  Pukin’ punkin.  Because let’s face it; it’s totally puking.

– Jacob


Beth is a stay-at-home homeschooling mom and photographer. She spends her days coming up with creative ways to inspire and teach her two oldest kids. Let’s be honest though, a big part of the day is spent chasing after the smallest one. She hopes to spread goodness and magic with her DIYs, recipes, and tips. Follow her on Instagram @PaperAngelsPhotos

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