Potion slimes! A whole new take on our awesome slime recipes! I love how you can take slime and turn it into any number of fun themes for favorite movies, favorite holidays or favorite science experiments. Think Ghostbusters too! This time, we are featuring a Harry Potter potion slime making project. Awesome for any kids who love Harry Potter and a great party activity, too!

It’s not uncommon for me to see my son whipping around a short stick in the air and chanting under his breath when he is playing outside. That’s because we are all a little bit Harry Potter crazy. He has an actual wand from Universal Studios, but for a 7-year-old, any short stick will do.

Potion making is certainly a science, and if you have poked around through our activities you will see how much we love our science activities. Slime is one of our absolute favorites these days! You can also check out our potion making table too!

Why not turn your favorite book into slime! Whether you make potion slimes or house colors slime, you can flex your creativity and create your own cool themes to represent favorite parts of your book or movie!

We couldn’t stop thinking about some of the cool potions slimes we could make for this Harry Potter slime project, so we ended up with 5 different potion slimes to share with you. We also teamed up with a friend, and she made some cool labels you can print for free {see below to get them}!

Slime is really very easy to make unlike some of Harry’s potions in the movie! Our slime definitely won’t blow up either. Make sure to have your wand handy just in case!

Potion slimes are super fun to make, and you can even mix the different slimes together for a cool swirling of slime! We mixed Polyjuice, Wolfsbane, and Veritaserum together to make our own unique potion!

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 this Harry Potter 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!

In the recipe below, we used our Liquid starch slime recipe. Only 3 ingredients, liquid starch, water and glue, and you have slime in no time is my motto!

NOTE: We have found that Elmer’s specialty glues tend to be a bit stickier than Elmer’s regular clear or white glue, and so for this type of glue we always prefer our 2 ingredient basic glitter slime recipe.

Harry Potter Slime Recipe

This slime recipe below makes one batch of slime. Follow the notes below for the specific add ins and glue color for each potion we made.

NOTE: Our Skele-Gro potion slime is made using white glue and no glitter. Our Draught of Peace potion slime is made with white glue, neon purple food coloring, and purple glitter. The same slime recipe will work with the white glue too. All the other slimes are made with clear glue slime and corresponding glitter! I did not use food coloring on any of the remaining slimes.


  • Liquid Starch
  • Water
  • PVA Washable Clear Glue
  • PVA Washable White Glue
  • Food Coloring
  • Glitter
  • Small Containers or Mason Jars
  • Printable Labels
  • Measuring Cup, Spoon, Container


STEP 1:  In a bowl mix 1/2 cup water and 1/2 cup of glue and mix well to combine completely.

STEP 2: Now’s the time to add food coloring, glitter, or confetti! 

STEP 3: Pour in 1/4 cup of liquid starch. You will see the slime immediately start to form. Keep stirring until you have a gooey blob of slime. The liquid should be gone!

STEP 4:  Start kneading your slime! It will appear stringy at first but just work it around with your hands and you will notice the consistency changes. You can also put it in a clean container and set it aside for 3 minutes, and you will also notice the change in consistency! 

SLIME MAKING TIP:   We always recommend kneading your slime well after mixing. Kneading the slime really helps to improve it’s consistency. The trick with liquid starch slime is to put a few drops of the liquid starch 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 liquid starch reduces the stickiness, and it will eventually create a stiffer slime.

Read on to see how we store all our slimes too!

How To Display Your Harry Potter Slime Potions

Ok, got your slime made? Now you need to get out your containers to display your potions! I found these super cool glass containers with the spring loaded metal closures at our local craft store. You can also use varying sizes of mason jars {the smaller ones though}.

Some of our containers came with a chalkboard label on them. I do not recommend using a chalkboard marker as it doesn’t erase very well. Plain old sidewalk or school chalk might be better.

Printable Hogwarts Potion Labels

However, an even better option is to print out these awesome Hogwarts Potions Labels that my friend whipped up for me. They look awesome, and I used a piece of double-sided tape to stick them to my jars. She has a ton more Harry Potter themed party ideas including wands, potions, treats, and more!

If you are having a Harry Potter themed party, our slimes would make an awesome party favor to take home! I have a couple of other slimes you could check out like our fake snot for an ogre theme {remember the snot on the wand from the first movie} or our gold slime to create a golden snitch {use the plastic reusable ornaments you see here}.

Check Out The Harry Potter Slime Potions You Can Make

Draught of Peace

Draught of Peace Slime is a calming magic potion using white glue, purple coloring, and purple slime!

Draught of Peace Harry Potter Potion Slime Making Activity for Science and Party IdeasPin

Skele-gro Potion

Do you remember who has to drink the Skele-Gro potion and why? We do! This is just a classic white glue slime, but you can add anything you like!

Skele-Gro Harry P.otter Potion Slime Making Activity for Science and party IdeasPin

Veritaserum Potion

Veritaserum Potion slime is dark and spooky just like Snape. Use black glitter with clear glue? Who uses this potion in the movies?

Veritaserum Harry Potter Potion Slime Making Activity for Science and Party IdeasPin

Felix Felicis Potion

Liquid Luck or Felix Felicis is awesome with gold glitter and clear glue. Do you remember who drinks the liquid luck and why?

Liquid Luck or Felix Felicis Potion Slime for Harry Potter theme science and parties.Pin

Wolfsbane Potion

Make Wolfsbane Potion Slime! Use blue glitter with clear glue! Do you remember who is a werewolf?

Wolfsbane Slime Harry Potter Potion Making Activity for PartyPin

Polyjuice Potion

Make Polyjuice Potion Slime! Use green glitter with the clear glue slime recipe. Why do Harry, Ron, and Herminie drink polyjuice potion? What happens to Herminie?

Polyjuice Potion Slime for Harry Potter Theme Party Activity or Science IdeaPin

The Science of Slime

We always like to include a bit of homemade slime science around here. Slime really does make for 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 the science behind the slime? 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…

When you add the borate ions to the mixture, it 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 rubberier like slime!

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!

Read more about slime science here!

Get your FREE printable slime recipe cards!

Helpful Slime Making Resources

These are the best resources to look through before, during, and after making your awesome Harry Potter slime!

More Fun Slime Recipes Inspired By Movies, Holidays & Science Experiments

If your kids love playing with slime, why not try more favorite slime ideas…

Grab the Ultimate Slime Recipe Bundle

All the best homemade slime recipes in one place with plenty of fantastic extras!

What’s Included:

  • The Ultimate Slime Guide contains all the specialty recipes you or your kids want to make! You’ll find all the best tips, tricks, hints, and slime-y info in almost 100 pages!
  • The Ultimate Slime Holiday Guide covers all the best holidays and seasons with special themes and slime-y projects!
  • The Ultimate Borax-FREE and Taste-Safe Slime Guide shows you how to make all the best borax-free, taste-safe, and non-toxic slimes kids love, such as marshmallow slime. These recipes do not use chemical activators such as saline solution, liquid starch, or borax powder, making them truly borax-free.
  • The Ultimate Slime Coloring Book is an easy-to-print coloring book kids will love! Color and design your favorite slimes!
  • The Slime Starter Guide is a fact-filled information guide with everything you need to know to make the best slime ever!
  • Slime Science Project Pack helps you turn slime-making into a science lesson!


  1. Hi – I am after your awesome harry potter potions printables – i have subscribed but cant find how to get link !
    Thanks in advance

  2. Mel, you don’t need to subscribe, simply click the link that is provided by the printable to download them. It will take you to my friends Harry Potter themed birthday party article.

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  6. how much slime is made if using the exact proportions as are in the instructions?

  7. how much slime is made when using the exact measurements that are given in the instructions?

  8. Pingback: 17 Magical Ideas for Your Child's Harry Potter Birthday Party in NYC
  9. Unless an out of the ordinary amount is added, no it will not. If they add to much it can color hands but is also pretty easily washed out. Darker food colorings like black may color hands a bit more.

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  11. Pingback: 25 Perfect Harry Potter Printables - Collected by Bombshell Bling
  12. Hi! I’m planning a Harry Pitter bday party, and I was testing your saline solution slime. I feel like the water evaporates leaving a slime that keeps breaking and isn’t stretchy. Do you have any tips or suggestions? Thank you! BTW, I love your website.

  13. Hi! I’m not sure quite what you mean by evaporating…We have containers of it for weeks on end. If you would like to email me sarah@littlebinsforlittlehands we can do some troubleshooting together!

  14. Pingback: DIY Harry Potter Crafts & Ideas - Red Ted Art's Blog
  15. Pingback: Ten Birthday Party Themes We Love – Confessions of a Not So Crafty Momma.

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