Galaxy Slime Recipe for Kids

Kids love the idea of exploring outer space, so today, I am going to show you how to make galaxy slime with kids. Homemade slime is awesome to play with, and even easier to make than you think! Just follow our simple galaxy slime recipe below to get started.

HOW TO MAKE GALAXY SLIME!

GALAXY SLIME

Slime lovers be warned! I took way tooooo many photos of our galaxy slime and feel I need to share them all! So you will find 22 pictures of awesome slime below.

Below you will see photos from beginning to end of the slime making process as well as cool action shots. Keep in mind once you mix all the slime colors and have fun making your own galaxy, the colors will have mixed together.

WHAT COLOR IS A GALAXY?

This is a great question and adds a whole other element to our slime! We did some research of what galaxies might look like on Google!

A galaxy is a collection of billions of stars, dust and gases held together by gravitational forces.  The earth and the rest of the solar system, is all part of the Milky Way Galaxy.

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I asked my son what he thought the colors of a galaxy might look like, and he was super excited to check out real photos. There is always one or two ways you can extend the learning behind a slime making activity!

See some of the colors we created for our galaxy slime below.

If we were to make this galaxy slime again, I would make even more black colored slime! You may want to make a double full batch of the slime recipe to have enough for a variety of colors.

SLIME TIP: To get the mix started, try laying out each slime as seen above! It’s a similar method to our cotton candy slime.

What colors will you make for your galaxy slime?

BASIC SLIME RECIPES 

All of our holiday, seasonal, and everyday slimes use one of five basic slime recipes that are super easy to make! We make slime all the time, and these have become our go-to favorite slime recipes!

I will always let you know which basic slime recipe we used in our photographs, but I will also tell you which of the other basic recipes will work too.  Usually you can interchange several of the ingredients depending on what you have on hand for slime supplies.

Here we use our Liquid Starch Slime recipe.  Slime with liquid starch is one of our favorite sensory play recipes!  We make it ALL the time because it is so quick and easy to whip up.   Three simple ingredients {one is water} are all you need.  Add color, glitter, sequins, and then you are done!

Where do I buy liquid starch?

We pick up our liquid starch in the grocery store! Check the laundry detergent aisle and look for the bottles marked starch. Ours is Linit Starch (brand). You might also see Sta-Flo as a popular option. You can also find it on Amazon, Walmart, Target, and even craft stores.

But what if I don’t have liquid starch available to me?

This is a pretty common question from those who live outside of the United States, and we do have some alternatives to share with you.  Click on the link to see if any of these will work! Our saline solution slime recipe also works well for Australian, Canadian and UK readers.

Now if you don’t want to use liquid starch, you can absolutely test out one of our other basic recipes using saline solution or borax powder. We have tested all these recipes with equal success!

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.

No more having to print out a WHOLE blog post for just one recipe!

Get our basic slime recipes in an easy to print format so you can knock out the activities!

—>>>  FREE SLIME RECIPE CARDS

SLIME SCIENCE

What’s the science behind the slime? The borate ions in the slime activator {sodium borate, borax powder, or boric acid} mixes 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.

The addition of water is important to this process. Think about when you leave a gob of glue out, and you find it hard and rubbery the next day.

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 is thicker and rubberier like slime!

MORE ON SLIME SCIENCE HERE

HOW TO TURN SLIME INTO A SCIENCE EXPERIMENT

GALAXY SLIME RECIPE

YOU WILL NEED:

• Clear Washable PVA School Glue {3-4 bottles}
• Water
• Liquid Starch
• Food Coloring
• Glitter/Iridescent Confetti Stars {optional but fun!}

*We used a separate plastic cup and craft stick {dollar store} to mix each color for easy clean up!

HOW TO MAKE GALAXY SLIME

1. In a bowl mix 1/2 cup water and 1/2 cup of glue, and stir to combine completely.
2. Now’s the time to add your food coloring and other add-ins.  Mix the color into the glue and water mixture.
3. Add 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!
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!

Note: I used 1/2 the quantity of the above recipe for each of the galaxy colors I wanted, and a full recipe for the black slime.

You definitely want to make a big portion of the black slime. We added both silver glitter and leftover iridescent confetti stars from this cool iridescent slime.

The galaxy slime we chose to make had hints of fuchsia…

mixed with hues of purple….

with a gorgeous orange swirl and turquoise blue. My son was amazed by the beauty of it all.

You can see I took a whole lot of photos of this cool slime activity! I love to show how it shimmers, stretches, mixes, and oozes. Is it a liquid or a solid? Slime science is chemistry and it’s cool.

If you have the space and the patience, how far can you get the slime to stretch? In my opinion the saline slime recipe is the stretchiest!

Swirling slime colors will eventually form one huge mound of deep space slime.

Make a little slime ball and see if it bounces! Do you think it will?

MORE HELPFUL SLIME MAKING RESOURCES!

Find everything you ever wanted to know about making homemade slime right here, and if you have questions, just ask me!

HOW TO FIX STICKY SLIME

HOW TO GET SLIME OUT OF CLOTHES

21+ EASY HOMEMADE SLIME RECIPES

SCIENCE OF SLIME KIDS CAN UNDERSTAND

READER QUESTIONS ANSWERED

YOUR SLIME SUPPLIES LIST

FREE PRINTABLE SLIME LABELS

THE AMAZING BENEFITS THAT COME OUT OF SLIME MAKING WITH KIDS

MAKE GALAXY SLIME FOR OUT OF THIS WORLD FUN!

Try more fun homemade slime recipes right here. Click on the link or on the image below.

No more having to print out a WHOLE blog post for just one recipe!

Get our basic slime recipes in an easy to print format so you can knock out the activities!

—>>>  FREE SLIME RECIPE CARDS