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50+ Valentines STEM Activities for Preschool, Elementary and Middle School

If you can’t get enough of themed STEM activities for kids, and you’re looking for a great way to bring STEM into your fun Valentine’s Day activities, then you’re in the right place! Here you will find over 50 Valentines STEM activities for preschoolers through middle school.

STEM activities for kids are always going to be one of my favorite parts about school programs and bonus brainbuilder activities.

Young kids and older kids alike can increase their skill levels in subject areas like problem solving, the design process, fine motor skills, critical thinking, math skills, the scientific method and a whole lot more all while having a great time when they try these Valentine’s STEM activities.

50 fun Valentine's Day STEM activities! Valentines STEM activities for kids in preschool through middle school. Hands-on Valentine science!

Valentines STEM Activities for Elementary and Beyond

Kids from 3-15 will love trying these Valentines STEM activities in the classroom, in their STEM centers, or at home with caregivers. In this list of STEM activities for Valentine’s Day, you’ll find activities divided by focus (Science, Technology, Engineering, or Math) as well as Valentine STEM activities divided into age groups.

Here you’ll find Valentine activities for preschool, elementary school, and middle school for kids aged 3-15.

valentine stem challenges

Where to Find Low Cost Materials for Fun Valentine STEM Activities

I like to use recycled materials a lot in my STEM lessons. I find that kids of all ages love trying educational activities that allow them to experiment with STEM in activities like building challenges, a design challenge, building the tallest tower, and making different shapes from different materials.

So I keep a “STEM Fun” cabinet filled with recycled materials, low-cost craft supplies like pipe cleaners, invisible ink, red cups, candy hearts, jelly beans, beads, and a few simple science supplies that you can find at your local dollar store.

Check out this list of supplies for science experiments for what I recommend to put in a STEM supply box.

You can also shop the following components to have your STEM supplies mailed directly to your door.

February STEM Challenge STEAM Package

If you want enough hands-on Valentine’s Day STEM activities to last the entire month of February, check out the February STEAM Lesson Plan Bundle.

You’ll get bonus worksheets and lesson plans to go along with each fun STEM challenge, including step-by-step instructions, a recording sheet to track each Valentine’s Day STEM activity, and worksheets that make a great addition to your STEM lesson plans.

50 exciting STEM Valentine's Day activities! STEM activities for Valentine's Day for preschoolers through middle schoolers. Low-cost Valentine science! 

More Valentine’s Day Educational Activities to Try!

Here are some other fun educational activities for Valentine’s Day that you can use in the classroom, in after-school programs, or at home to bring the holiday into your literacy centers and beyond!

50+ Awesome Valentine’s Day STEM Activities

The following low prep STEM challenges include some of our favorite science activities, slime recipes, Valentine’s Day engineering activities, math center activities, and more!

These provide the perfect opportunity to try easy Valentine’s Day activity ideas that provide the perfect bridge between a Valentine’s Day theme and traditional STEM lesson plans.

Valentine’s Day Hands-On Science Experiments

What do you think of when you think about a Valentine’s Day science experiment?

Candy science? a lesson on non-Newtonian fluids? Magic milk?

Whatever you think of, you’ll find a fun experiment in this list that uses simple supplies and teaches science concepts like states of matter, chemistry, the scientific method, and many others that will stick with your students the entire year.

Magic color reveal science Valentines These color-reveal Valentines are a fun way to add a science twist to a Valentine’s Day party.

Learn about the human body when you make this DIY heart model and learn how the human heart works.

The Valentine Heart chromatography experiment with markers is a fun activity that shows that different colors have different densities.

A great activity that kids ask for year after year is this Valentine’s Day slime. Learn how to make glitter slime right here.

This Valentine’s Day oobleck activity is a lesson in non-Newtonian fluids. Get the non-Newtonian fluid recipe here.

Making crystals is a super fun science activity, and these salt crystal hearts are so much fun during the Valentine season.

Make this festive Valentine’s Day lava lamp and learn about chemical reactions!

If you don’t want to make a lava lamp, try making fizzing hearts reactions to learn about the same chemistry concept.

You can also learn what is a chemical reaction for kids this Valentine’s Day!

And check out this fun list of Valentine candy science experiments.

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

Technology Activities for Valentine’s Day

Bring technology into the classroom with these Valentine technology activities.

Learn how to make your very own light-up Squishy Circuits heart.

If you have a coding caterpillar, you can learn all about what is caterpillar coding in these fun Valentine’s Day themed challenges. is a lot of fun to try!

You can express your sentiments safely and create secret messages when you write them in the binary alphabet code with these Valentine coding bracelets!

Learn about magnetic forces when you make this Valentine discovery bottle.

And find a list of all of our favorite Valentine’s Day coding activities for kids right here!

Valentine’s Day Engineering Challenges

Engineering is a lot more fun when it’s love themed! Try these Valentines STEM activities that little engineers will adore. Many of these activities use LEGO bricks, which I’m sure you use in a lot of STEM projects already.

Here you can learn how to build a LEGO heart the easy way!

Create your own love bugs and design how they would work in this love bug craft engineering challenge.

Build your own LEGO Valentines– it’s harder than you think!

These LEGO Hearts are a fun way to bring engineering into the Valentine’s Day holiday.

Design a homemade bouncy ball and give it to friends and classmates this Valentine’s Day!

Conversation Heart Structures are a fun way to bring design and engineering into the Valentine classroom.

Find even more Valentine engineering challenges in this list!

valentine stem challenges

Hands-On Valentine’s Day Math Activities

Add some STEM elements and seasonal fun to your math center with these math activities for Valentine’s Day.

Learn about factors and Venn diagrams with the Conversation heart Venn Diagram Factors activity.

Bring math into the kitchen with these Valentine Candy Recipes: Heart Lollipops.

Use conversation hearts as math pieces with these fun Valentine’s Day math activities

Younger kids will love using pattern blocks to create hearts in the Valentine Pattern Block Heart challenge.

Valentine STEM Activities by Grade

Here are my favorite Valentine’s Day STEM activities for grades from preschool through middle school!

Valentine’s Day STEM Lessons for Ages 3-5

Preschoolers and kindergarten kids will have tons of fun with these simple Valentine STEM activities.

If you are teaching kindergarten, then you’ll want this list of Valentine’s Day STEM activities for kindergarten.

Valentine’s Day STEM Lessons for Ages 6-12

Kids in first through fifth grade will have tons of fun with these STEM activity ideas for Valentine’s Day.

Teachers of 4th graders, check out this list of Valentines STEM activities for 4th grade.

Valentine’s Day STEM Lessons for Ages 12-15

Here you’ll find our favorite Valentine STEM activities for middle schoolers.

Grab these Valentine STEM Activities for Middle School and reactivate your middle school students’ interest in STEM.

These Valentine’s Day Science Activities for Middle School will make everyday science lessons easier.

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