Monster Slime Recipe and Activities (That Aren’t Scary)

What a fun glitter monster slime activity for kids! Learn how to make slime with kids during a preschool monster theme, around Halloween, or just because!

blue slime with googly eyes and foam triangle teeth with text that reads monster slime

Related: Types of Slime from A to Z

We love slime.

We love glitter.

Open-ended sensory play is on that list of things we love, too.

Add in some hands-science, and we’re even happier.

Needless to say, this glitter monster slime activity was a hit on many fronts.

Slime Safety

Before I jump in, though, a quick comment about safety.

Children need to be supervised around these materials, and under no circumstances should they be put in anyone’s mouth.

Be sure that everyone washes their hands after playing with the slime, too. We’ve never had any skin reactions to the recipes we’ve used, but everyone is different. It’s something to keep an eye on depending on what materials you choose to use (and if you or the children have sensitive skin or allergies).

How to Make Monster Slime

Over the years we’ve perfected making slime with kids. Slime is notoriously finicky, so it took a while before we found the exact combination of ingredients for a perfect slime.

I like the slime to be stretchy but not super sticky. If it’s sticking to my fingers (or the kids’ fingers) too much, that just isn’t as fun.

Materials for Glittery Monster Slime

Glitter glue

Liquid watercolors (food coloring would work, as well)

Water

Liquid starch

Monster Slime Directions

For our monster slime, we used purple, blue, and green slimes. You can choose different colors if you prefer.

How to Make Green Slime

Empty a bottle of green glitter glue into a bowl.

Add warm water to the empty glue bottle, shake it to loosen the remainder of the glue in the bottle, and pour into the bowl. Mix.

Now it’s time to add any extras. We just put a few drops of green liquid watercolor in at this point, to brighten the color from the glitter glue. Mix.

Measure out the liquid starch. I’ve found it’s best to use just under the amount of glue. The glitter glue we used was 6 ounces, so we measured out about 5 ounces of liquid starch. I’ve got a set of mini measuring cups we picked up at the grocery store that’s perfect for measuring slime. Mix.

Once the green slime-to-be has pulled away from the side of the bowl, it’s time to knead it. Yes, you knead it like bread! Knead until you’ve reached the consistency of slime that you prefer.

How to Make Purple and Blue Slimes

To make the additional colors, just switch out the color of glitter glue and liquid watercolors in the recipe above. To review, the recipe is as follows:

6 ounces glitter glue
5 ounces (approximate) warm water
A few drops of liquid watercolors or food coloring
5 ounces liquid starch

Once each batch of glittery monster slime is ready, store it overnight. We use airtight plastic bags or airtight containers to store our slime.

You can use it right away once you have the right consistency, but I’ve found letting it settle overnight makes it even better.

Ways to Play and Learn with Monster Slime

I don’t know about you, but when we make a new batch of slime, I love stretching it out. Holding it up high and watching it meander down to the table is usually the next thing we try!

There’s just something soothing and fascinating about the sensory experience of playing with and manipulating slime.

Here are a few more monster slime activities to try with the kids!

Make Slime Faces

Put the purple, green, and blue glitter slimes out on a table, along with a big platter. Then add a couple of bowls filled with googly eyes.

When we first did this, my son pointed out to me that “monsters need teeth, too!”, so add white foam triangles the slimy invitation to play and create.

Then making some monster faces! We had a goofy blue monster with quite a few teeth.

blue glitter slime with googly eyes and foam triangles

The purple slime started out as a bowl full of slimy eyeballs. Then it morphed into a Cylops.

purple slime with a large googly eye and two foam triangle teeth

Related: Preschool Fairy Tale Slime

From there, it became a Cyclops with a unibrow. I’m still giggling about this one.

A glittery green monster got a large tongue added to it, before we were sidetracked by the bubbles “growing” out of its slimy head.

green slime turned into a monster with googly eyes, white foam triangle teeth, and red foam tongue

That green slime monster turned into a “monster snail leaving a trail of goo”.

child's finger poking at green slime with googly eyes

Monster Slime Sensory Bags

Take part of each batch of slime and add them to separate plastic baggies. Then pop in some googly eyes. And, presto! Three sensory bags.

Slimy sensory bags are perfect for younger children who still put things in their mouths. I highly recommend sticking with name-brand plastic bags for this, as others aren’t quite as sturdy.

child's hand holding googly eye sensory bag

The sensory bags can be squished and manipulated by little hands. You can turn it into a scavenger hunt for googly eyes, too. Sensory bags are also a great way to practice mark making and early writing.

Hanging the bags in the window lets kids explore light. And they can watch gravity take its effect on slime that way, as well.

Slimy Monster Bottles

If you want to give each child their own monster slime, making slime sensory bottles is a fun idea.

We used these little round bottles we love, but I’d suggest wide-mouthed jars or bottles. It’s faster to put slime into those (although the noises made by putting slime into our sensory bottles did result in a lot of giggles).

Hot glue some googly eyes to the bottles, and you’ve got some non-candy treats for the kids.

purple, blue, and green round monster slime sensory bottles stacked on top of each other

Large bottles that are only partially filled up would be great sensory bottles, too. This way, the kids could turn the bottles this way and that . . . watching the slime as it creeps from place to place.

What Do Kids Learn from Slime?

Just playing for play’s sake is important. Letting the kids get their hands on the monster slime and explore it how they like is just plain fun, and shouldn’t be taken lightly.

child's hand stretching green monster slime

But it’s always good to know what children might be learning as they play with their monster slime. So, here’s a list for you. It is, by no means, exhaustive:

A chemical reaction takes place when the ingredients are mixed together, forming slime.
Slime is a non-Newtonian liquid, which means it has properties of both a liquid and a solid.
The effects of gravity can be explored using slime.
Children can work on color recognition with slime.
Adding shapes (like the circular googly eyes and triangular teeth) helps children identify shapes.
Fine motor skills are at work as children add items to, and remove items from, the monster slime.

More Monster Slime Fun

As we were in the process of making and exploring our glitter monster slime, I saw a couple more you might enjoy:

Slime invitation from Still Playing School that’s inspired by the beloved book Go Away, Big Green Monster.
The Imagination Tree has a slimy sensory writing tray that looks like a blast!

Have you ever made monster slime with the kids? Leave me a comment below and tell me what the children created!

More Slime Recipes (and Videos!)

Here are a couple more slimes you will love making with the kids. Check out the videos to see them in action.

Gold Slime Recipe – This is one of my absolute favorite slimes. It is just plain gorgeous, and it’s fun to use it to make other types of slime.

How to Make Galaxy Slime – Galaxy slime is perfect for a preschool space theme!

Lava Slime – We love using this slime with Star Wars LEGO minifigures or dinosaurs.

Preschool Monster Lesson Plans

Save time and get right to the playful learning with Preschool Teacher 101’s printable lesson plan sets. Each set includes over 30 learning activities related to the theme, and we’ve provided different versions for classroom teachers and home preschool families so all activities are geared directly toward your needs.