It’s amazing how you can make homemade slime look like it was meant to be all about Valentine’s Day! The perfect colors, a splash of glitter,  and a handful of confetti hearts makes a stunning Valentine slime kids will go crazy for! We show you how to make Valentines Day slime easily and how to set up a fun little slime bar for mixing up sparkling slime.

Amazing Valentines Day Slime with Video

There is nothing short of amazing to describe this super stretchy slime recipe for Valentine’s Day science and sensory play. I had such a fun time selecting themed “toppings” for this Valentine’s slime.

From glitter to sequins to confetti, there are quite a few ways to go a little crazy! Make sure to check out more Valentines Day science.

Printable Valentine Slime Project Pack

  • Easy to follow basic slime recipes for fluffy slime, borax slime, liquid starch slime, and saline solution slime.
  • Fun Valentine-themed slime recipes and printable labels for parties!
  • Combine slime and math with easy-to-use printable sheets.
  • Find fun ways to experiment with slime science including science information and key vocabulary.
  • Cool slimy theme activities perfect for centers, early finishers, or classroom party time!

A Slime Toppings Bar

Usually, we add the special mix-ins like glitter and confetti while we are making out homemade slime, but this time I set everything out like a toppings bar for after the slime batches were made! It was so much fun.

Setting up a slime mix-ins bar is great for a party or group activity if you want to be able to pre-make the slime and have it ready for the kids to decorate.

Slime Science Information

What’s the science behind this gorgeous slime? The borate ions in the slime activator  {sodium borate, borax powder, or boric acid} mix with the PVA {polyvinyl-acetate} glue and form this cool, stretchy substance. This is called crosslinking!

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

The addition of water is important to this process. It helps the strands slide more easily and ooze!

When you add the borate ions to the mixture, it starts to connect these long strands. They begin to tangle and mix until the substance is less like the liquid you started with and is thicker and rubberier like slime!

Read more about slime science here!

Basic Slime Recipes

All of our holiday, seasonal, and everyday theme slime use one of our 5 basic slime recipes that are super easy to make! We make slime all the time, and these have become our go-to favorite slime making recipes.

The base for any of these slimes uses one of our common slime activators, which include saline solution and baking soda, borax powder, or liquid starch.


Gather your supplies and set out your confetti, sequins, and glitter! Make a buffet of fun mix-ins! Usually we mix in these things as we go along, but this time we set it up to do at the end instead.

We made three batches of slime, but you can just make one or a whole bunch. Grab some plastic containers and friends and make slime for everyone to take home.

Want to make it Fluffy Valentine’s Day Slime? See our recipe here.


  • Clear Washable PVA School Glue {3 bottles, one for each color}
  • 1.5 Ounce Bottles of Glitter Glue {this is optional and the slime can be made without it, but we love it!}
  • Water
  • Liquid Starch
  • Food Coloring
  • Glitter
  • Sequins
  • Heart Confetti


STEP 1. Empty a small {around 1.5 ounce} bottle of cheap glitter glue into a 1/2 cup measure. Fill the remaining space in the measuring cup with the clear glue for a total of a 1/2 cup of glue.

If you don’t have the glitter glue, just use a full 1/2 cup of clear glue. Empty into a bowl.

STEP 2. Add 1/2 cup of water to the glue and mix well.

STEP 3. Color with food coloring for a deep shade of red, purple, or pink.

You can add more glitter now if you want too.

STEP 4. Measure and add 1/2 cup of liquid starch to your mixture and stir.

The slime will begin to form immediately. Once you have mixed as much as you can, remove your slime and knead until smooth.

STEP 5. Set your slime on trays and toss confetti, glitter, and sequins all over it! Have fun mixing it all up and playing!

Make several batches and swirl them all together.

Super stretchy and super fun! Once you learn how to make Valentines Day slime, you won’t be able to stop. It’s easy to make homemade slime, and even easier to dress it up with fun holiday and seasonal themes.


Make more slime! Check out our batch of pink Valentine’s Day slime! We added ties glitter, sequins, and heart confetti.

We have several different types of glitter in our purple Valentine slime below including tinsel glitter, fine glitter, and larger glitter plus the red confetti hearts.

Lay out the slime side by side and swirl them together for a gorgeous punch of glittering color. Eventually the slime colors will mix together, but if you have similar shades, you end up with a pleasing color.


We have some fun Valentine’s chemistry experiments to share with you too!