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in Seasonal STEAM· STEM Activities· Valentine's Day STEM Activities

Easy non-Newtonian Fluid Recipe Using Conversation Hearts

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Valentine’s Day is filled with fun and science when you make this non-Newtonian fluid recipe! Kids will love making this!

If your kids love oobleck, then they will love this fun version made with conversation hearts! Try it with your kids this Valentine’s Day if you have more conversation hearts than you know what to do with. It’s a fun Valentine STEM activity that kids will want to try over and over!

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

Related: Valentine’s Day STEM Activities and Science Experiments

Easy Oobleck Recipe for Kids

This easy oobleck recipe is not only fun, but it also teaches kids about non-Newtonian fluids.

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

Disclaimer: This post contains affiliate links at no cost to you for your convenience. 

What you’ll need to make the easy oobleck recipe:

valentine stem challenge cards
  • Conversation hearts
  • Kitchen mallet (you can also use a rolling pin)
  • Gallon-sized zip lock baggie
  • Cornstarch
  • Small container
  • Play tray

What is the Recipe for Oobleck?

Glad you asked! Keep reading and you’ll find out how to make this version with conversation hearts.

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

First, place your conversation hearts into a plastic bag and seal it up. Hammer the bag with your Kitchen mallet until the hearts become a fine powder.

Mix your conversation heart powder with the cornstarch in a 2 to one ratio. If you have one cup of heart powder, add two cups of cornstarch.

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

Add just enough water to form a malleable liquid.

Pour out your oobleck onto the play tray. 

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

Give your kids more conversation hearts to play with in the oobleck.

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

My preschooler liked placing the hearts on the surface of the oobleck and watching them slowly sink to the bottom.

The oobleck is slightly stickier than regular oobleck due to the addition of the sugar, but it also smells great!

What Kids Learn with Oobleck Activities

Valentine's Day is filled with fun and science when you make this easy oobleck recipe using conversation hearts! Kids will love making this!

Oobleck is a slime that has properties of both a solid and a liquid. Isaac Newton thought that substances were either solid or a liquid. He didn’t realize that a lot of solutions can have both properties of a solid and of a liquid. This is why anything that can act like a solid and a liquid is called a “non-Newtonian” fluid.

Cornstarch slime is a classic, because when you hit it or press it, it freezes up and acts like a solid. But as soon as you let go, it drips off your fingers just like a liquid.

valentine stem challenge cards

More Valentine’s Day Science and STEM

Valentine’s Day STEAM Activities

Nothing says Valentine's Day like pink and glitter. Mix them both in this fun Valentine's STEM activity making pink glitter slime!

Valentine’s Glitter Slime

These fun science Valentines are such fun for class valentines, school valentines, or valentines for friends and family! What color will you get?

Magic Color Reveal Science Valentines

Love STEM? Love Valentine's Day? You'll love this amazing and exhaustive list of Valentines STEM activities for kids of all ages!

Lego Heart Valentines 

Love STEM? Love Valentine's Day? You'll love this amazing and exhaustive list of Valentines STEM activities for kids of all ages!



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Filed Under: Seasonal STEAM, STEM Activities, Valentine's Day STEM Activities Tagged With: oobleck, valentines day

About Brenda Priddy

Brenda grew up thinking she hated science.

But when her 4-year- old daughter was more interested in reading science facts than fairy tales, Brenda realized she had to learn more about science to keep up with her daughter.

Through simple at-home science experiments, Brenda developed a passion for science and now acts as an advocate for STEM education for kids at her website STEAMsational.com.

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What is STEAM?

STEAM activities for kids promote the idea that science, technology, engineering, art, and math can all work together to help kids become critical thinkers, problem solvers, and innovators!

Join us on our journey to discover just how much fun science experiments can be.

What we do… 

STEAMsational offers STEM and science lesson plans and teaching resources to provide a firm STEM foundation for children in the classroom or home.

All you need to do is find your supplies, gather your scientists, and let the innovation unfold.

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