Nothing says Valentine’s Day like hearts and slime. If this is your first time stopping by our site, you will see how much we love making slime. If you have seen our slime ideas before, you know that we just had to share a Valentine’s Day Heart Slime with you and your kids. Slime is cool science and sensory play all rolled into one simple slime recipe.

VALENTINE HEART SLIME FOR KIDS

Best easy Valentines Day heart slime ever! Nothing says Valentine's Day like slime. If this is your first time stopping by our site, you will see how much we love making slime. If you have seen our slime ideas before, you know that we just had to share a Valentines Day Heart Slime with you and your kids. Slime is cool science and play all rolled into one simple to make slime recipe.

HEART SLIME AND SCIENCE

Slime is a cool science activity to share with kids and making slime is much simpler than you might think. Our Valentine’s Day heart slime is perfectly festive for the special occasion. Also check out our Valentine’s 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. This homemade Confetti Heart Slime recipe is yet another AMAZING slime recipe we can show you how to make.

HOW DO YOU MAKE SLIME?

We always like to include a bit of homemade slime science too, and that’s perfect for exploring Valentine 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…

When you add the slime activator or 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! Experiment with making the slime more or less viscous with varying amounts of foam beads. Can you change the density?

Valentines Heart Slime Science

CHECK OUT MORE: Valentine’s Day Slime Ideas

Heart Slime Chemistry for Valentines Day Activity

CLICK HERE TO GET YOUR FREE VALENTINE STEM ACTIVITIES

HEART SLIME RECIPE

This confetti heart slime uses one of our most basic slime recipes which is clear glue, water, and liquid starch. 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.

SUPPLIES:

  • 1/2 Cup of Elmer’s Washable PVA Clear Glue or White Glue 
  • 1/4 Cup of Liquid Starch
  • 1/2 Cup of Water
  • Valentine glitter and confetti hearts

Make Liquid Starch Slime Supplies

HOW TO MAKE VALENTINE SLIME

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

STEP 2: Now’s the time to add glitter and confetti!  You can never add too much! Mix the glitter and confetti into the glue and water mixture.

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!

Make slime with kids cool science

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! 

STEP 5: Enjoy your slime!

make heart slime for kids slime science

MORE FUN VALENTINE SLIME RECIPES

STORING YOUR CONFETTI HEART SLIME

You will see that we used the plastic refillable ornaments for storing our slime in the pictures above. This makes great Valentine gifts for kids to make for their friends.  Add our free printable Valentine labels for a fun science Valentine!

Slime lasts quite a while. Make sure to keep your slime clean and it will last for several weeks. Enjoy!!

Valentines Day Slime

MORE FUN VALENTINE ACTIVITIES

VALENTINES DAY HEART SLIME FOR KIDS

Click on the photo below for more awesome Valentine STEM activities to try with your kids.

Love making slime? Grab our free slime recipe cards!

19 Comments

  1. Click on black box that says get your recipe here and you will find step by step directions with pictures.

  2. Sta-flo is another common brand for liquid starch that works fine. If you don’t have access to any, try it with our saline solution slime recipe too.

  3. Can you make the basic slime the night before a classroom party and have the kids add glitter, confetti, etc?

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