Be my Valen-slimes with gooey heart theme slime! Valentine’s Day isn’t just for the adults! Around here we celebrate holidays and seasons with our homemade slime. For Valentine’s Day why not whip up a batch of Valentines Slime! Add our FREE printable slime labels and you have a perfect make and take Valentine. Whether you try red glitter, confetti hearts, or pink slime, it’s a fun and easy activity to do with kids.
HOW TO MAKE VALENTINES SLIME!
EASY VALENTINES SLIME
Our hearts are oozing with love for this Valentines Day Slime. Learning how to make Valentines slime is much simpler than you might think. This Valentines theme slime is perfectly festive for the special occasion. We love our Valentines Day Science Activities.
Slime making is even more fun when you add in creative themes for special occasion days like Valentine’s Day. We have quite a few slime ideas to share, and we are always adding more. Our Homemade Valentine’s Day Slime Recipe is yet another AMAZING slime recipe we can show you how to make.
VALENTINES SLIME CHEMISTRY FOR KIDS
Read all about the terrific chemistry behind the slime! Our post is great for introducing young kids to the wonderful world of polymers and contains some useful information and resources for the older kids too. You can also read more on the science below.
We always like to include a bit of homemade slime science too, and that’s perfect for exploring Valentine’s Day STEM. 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 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…
SLIME IS A NON-NEWTONIAN FLUID
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! 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?
FUN VALENTINES SLIME IDEAS
We made this Valentines Day slime with clear glue and white glue, food coloring, glitter and confetti hearts. However, there are so many variations to try!
Come up with your own favorite Valentines 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-shaped cookie cutters to make floam hearts. See it here!
- Try kneading in an ounce or two of soft clay after your slime is made for a butter slime (see it here). Make a batch in red and pink!
- Make it fluffy! Swirl fluffy slime in theme colors. See it here.
- Add all sorts of theme confetti and colored glitter
VALENTINES SLIME TIPS
The base for this Valentines theme slime uses one of our most basic slime recipes which is clear glue or white glue, water, baking soda, and saline solution.
Our easy, “how to make” slime recipes will show you how to master slime in 5 minutes! We have spent years tinkering with our 4 now 5 favorite basic slime recipes to make sure you can make the BEST slime every time!
We believe learning how to make 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 fluffy slime recipes that really work!
- Achieve awesome squishy, slimy consistency the kids’ love!
We have the best resources to look through before, during, and after making your Valentines slime! Make sure to go back and read the slime science above too!
- BEST Slime Supplies
- How To Fix Slime: Troubleshooting Guide
- Slime Safety Tips for Kids and Adult
- How To Remove Slime from Clothes
- Master Your Slime Training Series
Get our basic slime recipes in an easy to print format so you can knock out the activities!
VALENTINES SLIME SUPPLIES AND INGREDIENTS
SUPPLIES NEEDED FOR SALINE SOLUTION SLIME
I always encourage my readers to read through the recommended slime supplies list before making slime.
Learn how to stock your pantry with the best slime-gredients.
1/2 cup of Elmer’s Clear Glue per slime batch
1/2 tsp baking soda per slime batch
Food Coloring, Glitter, Confetti Hearts
1 tbsp of Saline Solution per slime batch
Note: One batch of homemade slime will fill 4-5 condiment size cups
VALENTINES SLIME RECIPE DIRECTIONS BELOW
This fun slime activity calls for one batch of our easy Valentines slime recipe. You can make more or less depending on your color or theme ideas! The best slime recipe starts with the right slime ingredients. Make sure to follow along with our measurements.
Start by adding your glue and water to a bowl and grab a mixing utensil. Mix it up and add food coloring and glitter as desired!
BEST SLIME ACTIVATORS
Add in your slime activator (baking soda and saline solution) to complete the chemical reaction you read about above in the science behind the slime section. If you scrolled past it, go back and read it with your kids!
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 science experiment!
You can also learn more about all our favorite slime activators here. Keep in mind that liquid starch, saline solution, and borax powder are all in the boron family. Neither of these ingredients is truly borax free.
SALINE SLIME RECIPE
STEP 1: Add 1/2 cup of clear Elmer’s Glue to your bowl
STEP 2: Mix with a 1/2 cup of water
STEP 3: Add food coloring, glitter, and red confetti hearts as desired
STEP 4: Stir in 1/4- 1/2 tsp baking soda
STEP 5: Mix in 1 tbsp saline solution and stir until slime forms and pulls away from sides of the bowl. This is exactly how much you will need with the Target Sensitive Eyes brand, but other brands may differ slightly!
If your slime still feels too sticky, you may need a few more drops of saline solution. As I mentioned above, 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.
NOTE: We have found that the Elmers specialty (glitter, color, glow) glues tend to be a bit stickier than their regular glue, and we prefer our 2 ingredient slime recipe for this glue.
MORE SLIME MAKING RESOURCES!
You will find everything you ever wanted to know about making homemade slime right here, and if you have questions, just ask me!
If you want to do something a little more than cutting out paper hearts this Valentine’s Day, try making our homemade slime instead. Host a slime party and give out slime party favors! Kids love slime.
STORING YOUR VALENTINES SLIME
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. I love the deli-style containers in my recommended slime supplies list here.
One thing to keep in mind, although zip-top baggies are cheap, they don’t store slime well and make more of a mess than anything!
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. For large groups, we have used condiment containers as seen here.
VALENTINES SLIME FOR KIDS’ SCIENCE AND TREATS
Click on the photo below for more awesome Valentine’s Day STEM activities to try with your kids.