The season of love is upon us! While we don’t really celebrate Valentine’s day at our house, I don’t mind using the holiday to do some fun science experiments and STEM activities! I put together a list of over 35 heart themed science and STEM activities in honor of Valentine’s day!

35 Heart Themed STEAM/STEM Activities

Chemistry Experiments

Hearts on Fire Valentines Science Experiment
Chasing Hearts Challenge
Crystal Hearts Valentines Science Experiment
Peeps Playdough and Heart Engineering Challenge
Crystal Heart Valentine Science Experiment
Watercolor Surprise Heart Art Painting Ideas
Heart Art Salt Painting Project
Interlocking Crystal Hearts

Engineering

The Love Boat STEAM Engineering Challenge for Kids!

Experimenting with States of Matter
Chocolate Hearts Science Experiment: Forms of Energy!
How to Make Simple Melting Love Hearts

Fizzing Hearts

STEAM Valentines – Fizzy Heart Science
Valentine’s Day SCIENCE Activity
Bubble Painting – Fun with Science
Valentine’s Hearts Fizzing Chemical Reactions

Math

Geometric Heart – Valentine STEM
Heart Tessellation – Valentine Math
Valentine’s Math – Pascal’s Triangle
Valentine Math Activity: Valentine’s Venn Diagram
Counting Roses Activity for Valentine’s Day
How to Make a LEGO Heart

Mechanics of a Real Heart!

Easy Heart Pump Model: Cardiovascular STEM for Kids
Build A Functioning Heart Model – Heart STEM Activity
3D DIY Heart Model for Kids!

Physics Experiments

Floating Hearts Magnetic Challenge
Conversation Heart Catapult for Valentine’s Day
STEAM Balancing Heart Toy for Valentine’s

Sensory Experiments

Edible Valentine’s Day Conversation Heart Slime
Candy Hearts Oobleck Science Activity
Easy Valentine’s Day Heart Slime for Kids

Water Science Experiments

DIY Valentine using Water Science
Valentine’s Treasure Ice Sculpture
Science Valentines Skittles Experiment
Dancing Candy Heart Experiment
DIY Heart Shaped Bubble Wand
Color Mixing with Heart Snowball Smashing