And his heart grew three sizes that day… Make awesome Grinch slime to go along with the book or movie this season. The Grinch has such a wonderful message for kids and families all year round. Kids will love this fun lime green Christmas slime or Grinch Day activity!

Enjoy Grinch Activities This Holiday Season

The kids will love turning a favorite Christmas book and movie into slime with this super easy Grinch theme activity! Our simple Grinch slime recipe is perfect for little hands. This is just one of our many Christmas slime ideas to try like our Elf Snot Slime!

Slime making is even more fun when you add in creative Christmas themes like the Grinch. We have quite a few to share, and we are always adding more. Our lime green slime is yet another AMAZING slime recipe we can show you how to make.

We made this Grinch slime with clear glue, food coloring, glitter and confetti hearts. However, white glue is super easy to use and also works well for this recipe, but your color will be slightly different!

Make your own Christmas slime with these Christmas slime ideas!

Come up with your own favorite Grinch theme slimes:

  • Try adding a cup of foam beads to the recipe for a floam slime. Make a batch in green and a batch in red. Use heart shape cookie cutters to make floam hearts.
  • Try kneading in an ounce or two of soft clay after your slime is made for a Christmas butter slime. Make a batch in red and green!
  • Try adding red foils to a batch of neon green slime (similar to our gold leaf slime).

Basic Slime Recipes

Our easy, “how to make” slime recipes show you how to master slime in 5 minutes or less! We have spent years tinkering with our favorite basic slime recipes to make sure you can make the BEST slime every time!

We believe slime shouldn’t be disappointing or frustrating! That’s why we want to take the guesswork out of making slime!

  • Discover the best slime ingredients and get the right slime supplies the first time!
  • Make easy slime recipes that really work!
  • Achieve awesome slimy consistency the kids’ love!

Which Slime Recipe To Use?

We have several basic slime recipes that can all be used for making Grinch slime. You decide which one works best for you depending on what slime activator you want to use. This allows for some flexibility depending on where you live in the world! Not everyone has access to the same ingredients!

Each of the basic slime recipes below have the full step by step photos, directions, and even videos to help you along the way!

This awesome Grinch slime below uses our saline solution slime recipe, and makes for a super stretchy slime!

Helpful Slime Resources To Get Your Started

These are the best resources to look through before, during, and after making your awesome Grinch slime! We talk more about the slime science below too.

A Bit Of Slime Science

We always like to include a bit of homemade slime science around here! Slime is an excellent chemistry demonstration and kids love it too! Mixtures, substances, polymers, cross-linking, states of matter, elasticity, and viscosity are just a few of the science concepts that can be explored with homemade slime!

What’s slime science all about? The borate ions in the slime activators (sodium borate, borax powder, or boric acid) mix with the PVA (polyvinyl acetate) glue and forms this cool stretchy substance. This is called cross-linking!

The glue is a polymer and is made up of long, repeating, and identical strands or molecules. These molecules with flow past one another keeping the glue in a liquid state. Until…

You add the borate ions to the mixture,  and it then starts to connect these long strands together. They begin to tangle and mix until the substance is less like the liquid you started with and thicker and rubbery like slime! Slime is a polymer.

Picture the difference between wet spaghetti and leftover spaghetti the next day. As the slime forms, the tangled molecule strands are much like the clump of spaghetti!

Is slime a liquid or solid?

We call it a non-Newtonian fluid because it’s a little bit of both! Experiment with making the slime more or less viscous with varying amounts of foam beads. Can you change the density?

Did you know that slime aligns with the Next Generation Science Standards (NGSS)?

It does and you can use slime making to explore states of matter and its interactions. Find out more below…


Get your FREE printable Christmas STEM activities guide!

START HERE: Grab the FREE STEM Christmas Activities List!

Grinch Slime Recipe

If you don’t want to use saline solution as per this recipe, you can absolutely test out one of our other basic recipes using liquid starch or borax powder. We have tested all three recipes with equal success!


  • 1/2 cup of PVA Clear School Glue per slime batch
  • 1/2 tsp baking soda per slime batch
  • 1/2 cup water
  • Green Food Coloring, Glitter, Confetti Hearts
  • 1 tbsp of Saline Solution per slime batch


STEP 1. Add your glue and water to a bowl and mix well. 

STEP 2. Mix in food coloring and red confetti hearts as desired!


SLIME TIP: For a Grinchy-green slime color, you can use the neon green food coloring. Or try a couple drops of yellow with a drop of green. Make sure to not make the slime too dark in color so you can really see your hearts!


STEP 3. Add in your slime activator (baking soda and saline solution) to complete the chemical reaction you read about above. Mix well. You will notice the slime start to thicken and pull away from the edges of the bowl.

If your slime still feels too sticky, you may need a few more drops of saline solution. Start by squirting a few drops of the solution onto your hands and kneading your slime longer. You can always add but you can’t take away! Saline solution is preferred over contact solution.

What does the baking soda do? It adds the firmness the mixture needs so you can pick it up. This ingredient is a great variable to tinker with for a slime science experiment!


SLIME TIP: We always recommend kneading your slime well after mixing. Kneading the slime really helps to improve it’s consistency. The trick with saline solution slime is to squirt a few drops of solution onto your hands before picking up the slime.

You can knead the slime in the bowl before you pick it up as well. This slime is stretchy but can be stickier. However, keep in mind that although adding more saline solution reduces the stickiness, and it will eventually create a stiffer slime.

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How Long Does Slime Last?

Slime lasts quite a while! I get a lot of questions regarding how I store my slime. We use reusable containers in either plastic or glass. Make sure to keep your slime clean and it will last for several weeks.

If you want to send kids home with a bit of slime from a camp, party, or classroom project, I would suggest packages of reusable containers from the dollar store or grocery store or even Amazon.


More Awesome Grinch Activities

Interested in organizing a Grinch Day? Check out our list of fun Grinch Day activities!

Explore STEM with the Grinch. Download these Free Grinch STEM Cards.


Set up this balloon heart experiment. Substitute green balloons if you have them!

Build with gum drops with these candy and toothpicks building cards. Make a chimney for the Grinch (or Santa)

Christmas math puzzle with the Grinch!Grab the FREE instant Download here.


Printable Christmas STEM Project Pack


  • 25+ Christmas theme science and STEM activities with printable sheets, instructions, and useful information all using easy-to-source materials perfect for limited-time needs. Includes a holiday theme engineering pack with fun, problem-based challenges for kids to solve! NEW observation sheets included.
  • Try a Santa’s Letter airplane challenge or take the gingerbread house-building challenge! 
  • Explore the five senses with a specially designed Santa’s Lab pack.
  • Try a mini nature study with your favorite type of Christmas tree.
  • Try your hand at building shapes with gumdrop structure challenge cards or build shapes with jingle bells. Or try the Christmas-themed paper chain challenge!
  • Christmas Screen-free Coding activities include algorithm games, binary code ornaments, and more!
  • Explore 6+ Christmas Art Projects with famous artist-inspired activities that combine art history, process art techniques, and more with simple to-do ideas. 


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