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in STEM Activities

Marshmallow Science Fair Projects for Elementary

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If you love marshmallows, you’ll love this list of marshmallow science fair projects that kids can enter into their school science fair!

After Christmas and the big holiday rush is over, you know what I’m left with?

Stale marshmallows.

If you love marshmallows, you'll love this list of marshmallow science fair projects that kids can enter into their school science fair!

I don’t want to waste them, but no one in my family likes to eat stale marshmallows. But I feel so wasteful when I throw them out!

Enter marshmallow science fair projects. 

These science fair projects are the perfect way to use stale marshmallows and help kids learn something at the same time!

Marshmallows have never been this educational before.

Let these ideas spark even more ideas for how you can use marshmallows in your STEM activities!

Related: The Ultimate List of Kids’ Science Projects

Parts of a Science Fair Project

If you love marshmallows, you'll love this list of marshmallow science fair projects that kids can enter into their school science fair!

Each school will have varying rules for their projects, but in general, most science fair projects must include:

A hypothesis.

Research.

Investigation with variations and a control group.

Record of results.

All science projects start with open ended questions,  such as, “what will happen if…?”

steam challenge cards

Marshmallow Science Fair Projects- A Fantastic Way to Use Old Marshmallows

Try these adorable and simple marshmallow science fair projects and not only will you use up those old marshmallows, but your kids will learn something along the way, too!

My kids love learning about scientific principles and exploring the scientific method using everyday items around the house.

Marshmallows are the perfect tool for learning about density, Boyle’s law, blood cells, engineering, and more!

If you love marshmallows, you'll love this list of marshmallow science fair projects that kids can enter into their school science fair!

Marshmallow Density Experiment

Dissolving Peeps Science Experiment

Blood Cell Science Experiment

If you love marshmallows, you'll love this list of marshmallow science fair projects that kids can enter into their school science fair!

Solar Powered Marshmallow Melter Experiment

Effects of Liquids on Marshmallows Experiment

Boyle’s Law Science Experiment

Expanding Marshmallows Science Experiment

If you love marshmallows, you'll love this list of marshmallow science fair projects that kids can enter into their school science fair!

Marshmallow Shooter Science Experiment

Marshmallow Boat Building Challenge

What Can a Marshmallow Absorb?

steam challenge cards

More Fun Science Fair Project Ideas

If you love science and STEM activities but don’t like hunting for supplies, we love the Mel Science kits. They have options for elementary and middle school, and each kit comes with all the supplies needed for each experiment!

Try these fun science fair project ideas when you’re finished exploring marshmallow science fair projects.

Candy Science Fair Projects

Classic Science Fair Projects

Active Science Fair Projects

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Filed Under: STEM Activities

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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