20 Minute Pumpkin Slime

Carving pumpkins this Halloween? Don’t throw out those pumpkin innards and make this oozing pumpkin slime that your kids will love.

Pumpkin slime
Carving pumpkins this Halloween? Don’t throw out those pumpkin innards and make this oozing pumpkin slime that your kids will love. #pumpkinslime #pumpkingutsslime

MAKE OOZING SLIME OUT OF PUMPKIN INNARDS!

Happy October! As we get closer to Halloween, millions of households are purchasing pumpkins to create their very own scary Jack-O-Lanterns to celebrate the spooky night. Over 145 million Americans are expected to participate in this fun Halloween activity this year.

One of the first steps to carving a Jack-O-Lantern is to cut off the top of a pumpkin and scoop out the insides. The rest involves the shell of the pumpkin – but what about those guts? Most people toss out the ooey gooey insides that are leftover because they aren’t sure what else they can do with it.

Maybe you’ve roasted the seeds for a yummy snack? Or maybe you compost the pumpkin innards. But have you ever made pumpkin slime?!

This Pumpkin slime was created by the scientists and moms at Yellow Scope, Marcie Colledge, PhD and Kelly McCollum, MPH, as a fun way people can use the insides of the pumpkin to eliminate waste and keep up the spooky season fun.

Safety Warning: If you have a pumpkin allergy, touching pumpkin pulp and seeds can irritate the skin or cause hives. Try a recipe from our other slime blogs (see links above)!

What Makes Pumpkin Slime so Satisfying?

What makes slime so satisfying? Well, it looks pretty cool, but the essence of slime is its texture. It’s liquidy enough that it will squeeze through your fingers, but solid enough it won’t just pour out of your hands. Something that has both liquid and solid qualities at the same time is called a non-Newtonian fluid. 

Let’s start with the glue. Glue is made of long molecules called polymers. Polymers are long chains of repeating units, like small sections of necklaces. Glue is made up of lots and lots of these little units of polymers that can slide over each other; this is what makes glue flow like a thick liquid.

Contact lens solution contains boric acid. The borate ions linked up with the glue, thickening the polymer – kind of like if you started tying the necklace sections together. They still flow, but not as well. This made the glue solution stiffer.

polymers | Yellow Scope

This cross-linking of glue molecules is what creates slime. If you put your pumpkin slime in a small bowl or muffin tin, it slowly acts like a liquid and will mold to the shape of the container. But when you apply pressure, it hardens up and feels more like a solid. What fun!

Easiest Ways to Scoop out a Pumpkin

Scooping out the innards of a pumpkin can be really messy and hard to do. Some make roasted pumpkin seeds which can be tedious separating the slimy innards from the seeds. Keep it all together and make the kids a fun surprise with pumpkin slime.

There are a few different ways to scoop out the sides of the pumpkin. A few options found online are:

close up of pumpkin innards

WHAT YOU’LL NEED TO MAKE PUMPKIN SLIME

ingredients for pumpkin slime
  • 1 medium bowl
  • 2.5 oz clear Elmer’s glue (half a typical 5 oz bottle)
  • 1/2 teaspoon water
  • 1/2 teaspoon baking soda
  • 1/4 cup pumpkin pulp with seeds (a small pumpkin will do!)
  • 1 tablespoon contact lens solution (containing boric acid)
  • 1 spoon
  • 1/4 cup measuring scoop
  • measuring spoons
  • Optional: plate and two forks (for separating out excess seeds)

Steps to Create Pumpkin Slime

  1. Cut your pumpkin in half and scoop out 1/4 of the pulp and seeds with the measuring cup.
  1. Optional: some pumpkins have a lot of seeds and little ‘goop’. If you want, you can put the contents of your pumpkin onto a plate and use two forks to separate out the excess seeds, so you have more goop to add to your slime.
pumpkin guts scoop and separate | Yellow Scope
  1. Add the glue and water to the bowl and mix together with the spoon.
  2. Mix in baking soda.
  3. Add the pumpkin guts and mix.
  4. Add the contact lens solution and mix again, this time using your hands! Continue to mix until the slime comes easily away from the walls of the bowl.
add solution to pumpkin slime | Yellow Scope

Now you have your pumpkin slime! Squeeze and stretch to your heart’s content! Stop using it right away if it makes you itchy or gives you hives. You may have an allergy you didn’t know about.

pumpkin slime

Youtube video with results: https://www.youtube.com/watch?v=wpHs1zKmiow&feature=emb_title

*Posts may contain affiliate links. If you purchase a product through an affiliate link your cost will be the same, but My Mommy Style will receive a small commission. Your support is greatly appreciated!

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