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Easy Halloween Slime: 7 Spooky Sensory STEM Activities

Easy Halloween Slime

Slime. It is just a staple of sensory play. I know some moms hate it, but I think it is super fun. And kids just can’t get enough of it.

I fully admit it can get tiring to make the same stuff over and over. So why not theme it out? Halloween is one of my favorite holidays for theme sensory activities. Time to make some Halloween slime.

(But don’t think you have to limit yourself to Halloween with these! They fit with lots of themes year round.)

Halloween Slime: Pumpkin fluffy slime, deep space slime, and addins including Halloween cookie cutters, spiders, pumpkins, and candy corn.

Halloween Slime

Halloween is the perfect holiday for slime. It oozes and slowly taps everything in its path. It’s well, slimy! Use that creepy ick factor that kids love so much to add a little sensory STEM to your day.

You can learn all about the science of slime here: Slime Science.

Pumpkin Slime

Fall is pumpkin season, right? So we are starting off with pumpkin slime.

You can, of course, just make orange slime. Or add a little pumpkin spice to your regular spice recipe. But this time we decided to try fluffy slime. It has a bigger texture and shapes nicely into pumpkins for your sensory play time!

Fluffy Pumpkin Slime Ingredients

  1. Glue
  2. Foam Shaving Cream
  3. Pumpkin Spice
  4. Saline Solution (Contact Solution)
  5. Baking Soda

How To Make Fluffy Pumpkin Slime

Put 3 cups shaving foam into a bowl. (Just measure as best you can.)

Add in orange food coloring, or mix red and yellow. (Yay for color STEM! Get more here: Color STEM for Kids)

Add in 1/2 cup of glue and mix it into the shaving foam.

Add in 1/2 teaspoon baking soda and mix again.

Finally, add in 1 tablespoon saline contact solution. This is what is going to make your concoction turn into slime. Gently mix everything together until you have slime the consistency you like!

fluffly pumpkin slime with pumpkin cookie cutter, shaving foam, and pumpkin spice seasoning

Using Contact Solution To Make Slime

I’ve made a lot of slimes, and honestly, I prefer the borax method. It’s simple and once you’ve got your box of borax you can do so much with it. (Like make a ton of slime and crystals.)

But not everyone wants to use borax, and not everyone has it. Therefore we changed it up and went with the baking soda/saline solution method. This saline solution is contact solution. Sadly you can’t just dissolve salt in water and use it. Why? Contact solution has borates in it. Those borates are what activate the cross polymer linking that gives slime its unique properties.

(Learn all about cross-linking and how slime comes together by clicking here: Slime Science)


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Spider Web Slime

Spiders are an important part of our ecosystem. But… they can be creepy. Perfect for Halloween though.

You can make our own spider web slime to have some creepy fun!

Spider Web Slime Supplies

  1. Clear Glue
  2. Warm Water
  3. Borax
  4. Glitter
  5. Plastic Spiders

How To Make Spider Web Slime

Put 4 ounces of clear glue into a bowl with 4 ounces of warm water. Mix well.

Add in glitter.

In a separate bowl mix 1 teaspoon borax with 1/2 cup of water. Mix well.

Teaspoon by teaspoon, add the borax solution to the glue solution, mixing as you go. Your slime will start to form. Keep adding borax solution until your slime is the consistency you like.

I prefer slime that isn’t very sticky, so I tend to add more borax solution. But for spider web slime, sticky is good. It makes it more realistic. So add it in small amounts to control the sticky factor.

Get some plastic spiders and give it to your child to play with!

Dr. Frankenstein’s Slime

This is a fun themed out slime, and it is super easy because you are just using the basic slime recipe with coloring and addons for the Halloween fun.

Dr. Frankenstein’s Slime Supplies

  1. Glue
  2. Warm Water
  3. Borax
  4. Green Food Coloring
  5. Googly Eyes

How To Make Dr. Frankenstein’s Slime

Follow the same basic recipe as before.

Put 4 ounces of glue into a bowl with 4 ounces of warm water. Mix well.

Add in green food coloring.

In a separate bowl mix 1 teaspoon borax with 1/2 cup of water. Mix well.

Teaspoon by teaspoon, add the borax solution to the glue solution, mixing as you go. Your slime will start to form. Keep adding borax solution until your slime is the consistency you like.

Once your slime is the consistency you like, add in the googly eyes! Enjoy the fun play of adding eyes and creating a monster.


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Additional Halloween Slime Ideas

Halloween Jelly Bean Slime

This is a fun edible slime, perfect for little ones who still like to taste everything.

You can find the Jelly Bean Slime recipe here: Edible Slime. To make this more Halloween-y, use orange jelly beans to make the slime and add in some green and black ones to play with!

Ghost Slime

This, quite honestly, is one of my favorites. Why? You make the simplest slime, but with the right name it is a whole new exciting activity!

Make your basic slime using white glue.

Yep, that’s really it. No extras, make our easiest slime, just keep it white. Bam, you have ghost slime.

Okay, you can make this one extra fun by giving your children black construction paper to put the slime on. It really stands out that way and looks extra ghost-like.

Black Hole Slime

Is space Halloween related? Not really. But Halloween is a time of scary stuff, and if you think about the awesome power black holes have to suck up everything in existence around them… yeah, pretty scary. (You don’t have to tell your kids that part.)

You could also call this midnight slime.

Make your basic slime, but add a ton of food coloring to make it black. I recommend lots of red and blue to start to get a deep purple going. That alone can look good, but also consider adding in a touch of green. Then add glitter.

You will get a deep dark slime that looks like it came from space.

(Obvious drawbacks of this slime is the large amount of food coloring you need to add to get the color right. Oh, and the use of glitter. Done right, it’s pretty cool. However, you can make it easier and get black glitter glue.)

Black Hole Slime Space Slime for Kids with picture of black sparkly black hole slime

Apple Fluffy Slime

If you aren’t a big pumpkin fan you can use the same recipe with just a few tweaks to make apple slime!

You need red food coloring and apple flavoring. You can find this online (click here) or at a craft store in the baking session.

Instead of adding the orange food coloring and pumpkin spice add the red and the apple flavor!

Safety Note: Make sure your kids know that just because some slimes smell like food it does not mean they are. Keep an eye on your kiddos so they don’t taste the fluffy apple slime.

Pictures of candy corn slime, spider web slime, black hole slime, and pumpkin slime

Additional Slime Add-Ins

You can really up the sensory fun of slime by putting in fun add-ins to play with. Whatever type of slime you make you can add small items to manipulate with the slime.

Halloween Slime Add-In Ideas

  1. Googly Eyes
  2. Plastic Spiders
  3. Halloween Cookie Cutters
  4. Small Halloween Erasers (check Target for these)
  5. Candy Corn (safety: don’t let your kids eat them with non-edible slime!)
  6. Candy Pumpkins (safety: again, don’t eat the candy once it has been in the slime)

Halloween Slime Fun

7 Spooky Halloween Slimes

Halloween STEM and Learning Activities

Easy and fun STEM and learning activities perfect for Halloween!

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