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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.

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.

Teaching Resources for Valentine’s Day

Here are some fun STEM teaching resources for Valentine’s Day that you can use in the classroom.

Browse the entire category of Valentine’s Day classroom supplies here or grab some of my Valentine’s Day favorites from the list below.

valentine build a bot

Love Bot Science Bots

learning resources pumping heart model

Pumping Heart Model

edible candy food science chemistry kit

Candy Chemistry Science Lab

yumology sweets lab candy science

Yumology Candy Science Kit

glowing candy lab science kit

Glowing Candy Lab Science Kit

exploding candy lab science kit

Exploding Candy Lab Science Kit

chemistreats classroom science valentine gifts

Chemistreats Classroom Candy Science Kits

lolipop lab science kit

Lollipop Lab Candy Science Kit

candy vending machine stem kit

Candy Vending Machine

candy perfume lab science kit

Candy Perfume Science Lab

lego roses

LEGO Roses

plasma heart

Plasma Heart

cross section heart model

Cross Section Heart Model

lego flower bouquet

LEGO Flower Bouquet

lego valentine heart bear

LEGO Valentine Heart Bear

cute valentine building block bears

Valentine Building Block Bears

valentine teddy bear kit

Valentine Bear Building Kit

clockwork heart building kit

Clockwork Heart Building Kit

lego friends flower and chocolate box

LEGO Friends Flower and Chocolate Kit

valentine lego card swans

LEGO Pop up Valentine Card with Swans

lego love birds

LEGO Love Bird Building Set

building brick lego candy shop

Building Brick Candy Shop

lego valentine wreath

LEGO Valentine Wreath

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

valentine stem challenges

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!

Valentine Science Books and More!

These fun Valentine’s Day Books for kids will teach kids about the science around Valentine’s Day, the history of the holiday, and a whole lot more!

the calendar kids meet february book

The Calendar Kids Meet February Book

valentines day math workbook

Valentines Day Math Workbook

in my heart a book of feelings

In My Heart a Book of Feelings

i love you around the world coloring kit

I Love You Around the World Valentine Coloring Book

valentine activity book

Valentine Activity Book

candy bites the science of sweets book

Candy Bites the Science of Sweets

holidays around the world valentines day

Celebrate Valentine’s Day Holidays Around the World

valentines day coloring book for kids

Valentine’s Day Coloring Book

hear your heart science book for kids

Hear Your Heart Science Book

cadiology for kids book

Cardiology for Kids Book

valentines day riddles book

Valentine’s Day Riddle Book

lego valentines day fun

Build Valentine’s Day Fun with LEGO

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 Classroom Decorations

Add some Valentine’s Day festivities and flair to your classroom with these classroom decorations for Valentine’s Day!

valentine vibes classroom door decoration

Valentine’s Day Door Decorating Kit

love letter garland decoration

Love Letter Garland

valentines day classroom door tissue paper door decoration

Tissue Paper Classroom Valentine’s Door Decorations

valentines day window clings for classroom

Valentine’s Day Classroom Window Clings

happy valentines day classroom door decorating kit

Valentine Letters Classroom Door Decorations

valentine party classroom decor kit

Valentine’s Day Classroom Decorating Kit

our class is sweet classroom decorations

Our Class is Sweet Cupcake Valentine’s Day Classroom Decorating Kit

our love for learning grows classroom decoration

Our Love for Learning Grows and Grows Classroom Decorations

a class full of sweethearts valentines day decorating kit

A Class Full of Sweethearts Classroom Decorations for Valentine’s Day

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!

Classroom Valentines from Teachers to Kids

Your students will love any of these creative classroom valentines for kids from their teacher!

printable valentines for kids tea party

Printable Tea Pun Valentines that Kids Will Love

If you want the best non-candy valentine for kids, look no further than these zoo printable valentines for kids! Kids will love these punny valentines that include a toy zoo animal with every valentine.

Zoo You Want to Be My Valentine Zoo Printable Valentines

If you need a creative and boy-friendly valentine, these army men printable valentines are the perfect non-candy valentines for your son's classroom! #valentinesday #printablevalentines #valentines #kidsvalentines

Army Men Printable Valentines for Kids

stem valentines for kids

Printable STEM Valentines for Kids

kid friendly valentines for classmates

Ingenious School Valentines Ideas For Classmates

STEM valentines celebrate the science side of Valentine's Day! These printable STEM valentines are the perfect class valentine for scence-loving kiddos.

Magic Erupting Color Reveal Science Valentines for Kids

chemistry valentines puns

Printable Punny Chemistry Valentines for Kids

Love Valentine's Day? You'll love these adorable printable heart non-candy LEGO valentines perfect for classroom parties or just for fun!

Printable LEGO Valentines for Aspiring Engineers!

fidget transformers valentines gift

Fidget Transformers

invisible ink classroom valentines

Invisible Ink Classroom Valentines

classroom valentine building kits

Classroom Valentine Food Building Valentines

parachute classroom valentines

Parachute Classroom Valentines

valentine build a bot

Valentine Love Bot Valentines

science volcano valenitnes

Classroom Valentines Erupting Volcano Science

valentine stem robot kit

Classroom STEM Robot Building Kit

classroom fuse bead valentines

Classroom Fuse Bead Valentines

maze classroom valentines

Maze Classroom Valentines

paper airplane classroom valentines

Paper Plane Classroom Valentines

valentine stem kit for classroom

Classroom Valentine STEM Kits

flower building classroom valentines

Flower Building Classroom Valentines

valentines day appliance building blocks for classroom

Valentines Day Appliance Building Block Valentines

building animal classroom valentines

Animal Building Classroom Valentines

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.

Classroom-Friendly Valentine Shirts

I love wearing fun Valentine-themed shirts in the classroom during February. Here are a few of my favorite Valentine Shirts for Teachers.

be kind valentine teacher shirt

Be Kind Valentine Teacher Shirt

i love you sign language shirt valentines day

I Love You Sign Language Teacher Shirt

kindness teacher valentine day shirt

Kindness Teacher Valentines Day Shirt

heart teacher valentine earrings

Wood Heart Earrings for Valentine’s Day

teaching sweethearts valentine teacher shirt

Teaching Sweethearts Valentine’s Day Teacher Shirt

my class is full of sweethearts teacher shirt

My Class is Full of Sweethearts Teacher Valentine’s Day Shirt

heart tie dye shirt valentines day teacher shirt

Tie Dye Heart Shirt for Teachers

love all day every day teacher shirt

Love All Day Every Day Teacher Valentine’s Day Shirt

painted heart valentines day shirt

Painted Heart Valentine’s Day Shirt for Teachers

heart fraction math teacher shirt

Heart Fractions Math Teacher Valentine’s Day Shirt

heart penguin earrings for teachers

Penguin Heart Teacher Earrings

valentine alphabet teacher shirt

Valentine Alphabet Teacher Shirt

valentine note earrings for teachers

Heart Envelope Valentine Earrings

love sign language teacher shirt

ASL Sign Language Love Valentine ASL Teacher Shirt

all we need is love teacher shirt globe

All We Need is Love Globe Shirt

valentine kittens teacher shirt

Valentines Cats T Shirt

chemistry valentines teacher shirt science teacher

Valentine Elements Chemistry Teacher Shirt

sped valentine inclusioin shirt

Valentine SPED Teacher Inclusion Valentine’s Day Teaching Shirt

teacher conversation hearts shirt

Teaching Valentine Conversation Hearts Shirt for Valentine’s Day

this teacher loves her kids valentine shirt

This Teacher Loves Her Students Valentine’s Day Shirt

dinosaur love teacher shirt valentines day

Valentine Dinosaur Love Valentine’s Day Shirt for Teachers

Wearing a fun shirt, decorating the classroom with red and pink decorations, and doing other fun Valentine’s Day activities will make Valentine’s Day about more than just cardboard Valentines and candy.

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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