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Squishy Circuits Light-Up Heart STEM Activity

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Kids will love this fun Valentines STEM activities featuring Squishy Circuits! Learn all about circuits this Valentine’s Day with hands on STEM activities!

Valentine’s Day is all about love, candy, and puns, but you can also make Valentine’s Day about electricity and circuits! Make a light-up heart engineering activity for kids and make your love connection electrifying!

This activity is one of our favorite technology activities for kids!

Kids will love this fun Valentine's Day STEM activity featuring Squishy Circuits! Learn all about circuits this Valentine's Day!

Light-Up Heart Valentine STEM Activity

You don’t have to be an electrical engineer to help kids learn the basics of circuits. Who knew play dough could be so educational for kids of all ages?

What you’ll need to make a Squishy Circuits Heart:

valentine stem challenges

How to Make a Light Up Heart

Before starting our project, I used the Squishy Circuits conductive dough recipe to make white dough.

I added glitter for fun. When the dough cooled, it was ready to use to build circuits!

Kids will love this fun Valentine's Day STEM activity featuring Squishy Circuits! Learn all about circuits this Valentine's Day!

Monkey made an outline of a heart with a rope of conductive dough. She made the inside from red insulating dough.

We found that if the two sides of the conductive outer circle touched, the lights wouldn’t light up. So we kept the two sides close, but separate.

Kids will love this fun Valentine's Day STEM activity featuring Squishy Circuits! Learn all about circuits this Valentine's Day!

Monkey added two red lights to the top and bottom of the heart, making sure the long side of the LED light connected to the same side of the dough as the red battery wand (but don’t let the raw wires touch the raw battery wands!

This can make a spark and give you a mild shock).

Kids will love this fun Valentine's Day STEM activity featuring Squishy Circuits! Learn all about circuits this Valentine's Day!

Switching on the battery lit up the heart!

Aww! You light up my heart!

valentine stem challenges

More Valentine Activities for Kids

Valentine’s Hearts Fizzing Chemical Reactions

Heart Science Projects

Valentine Heart Chromatography Experiment with Markers!

Valentine Lama Craft



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