Fizzy Heart Bombs (Valentines STEM for Kids)

Learn how to make Fizzy Heart Bombs for Valentine’s Day. This easy STEM activity is always so much fun for kids of all ages to play with. Even toddlers and preschoolers can join in on the fun as they watch their hearts bubble and fizz away.

Adult supervision is required for all activities at all times. Some of the links provided in this blog are affiliate links. I will be paid a commission if you use this link to make a purchase.

There’s no better way to show kids that you love them than by spending quality time together. Some Valentine’s day themed activities are perfect for finding ways to spend with your little ones. Or you can invest in the Valentine’s Day Activity Pack, which is filled with educational printables for you kids.

Table of Contents

• What You’ll Need
• Instructions
• The Science Behind the Fizzy Hearts
• More Valentine’s STEM Activities
• You May Also Like

Materials Needed

1. Baking soda
2. Red or purple food coloring
3. Heart molds
4. Small Bowl
5. Spoon
6. Water
7. Cookie Sheet
8. Pipettes
9. Vinegar

How to Make Fizzy Heart Bombs

1. Mix the baking soda, red food coloring and water together in a small bowl.

Add the water a little bit at a time. You want enough water so that the baking soda sticks together, but not so much that it turns soupy.

2. Place the baking soda mixture into the heart molds.

I used my silicone heart molds. They worked perfectly for this activity and can be used for so many other fun ideas.

3. Place the hearts into the freezer and let them harden. 

I left mine overnight, but you can use the hearts after 30 minutes or so if you prefer.

4. Place the hardened heart onto a cookie sheet.

I used a cookie sheet because it makes the activity easier to clean up afterwards. You can also use a shallow tub or a tray.

5. Place some vinegar in a small bowl.

You don’t need a large amount of vinegar, but you can always addmore to the bowl when you need it.

6. Use a pipette to pick up the vinegar and drop it onto the hearts.

Using a pipette is a wonderful way for young children to develop fine motor skills, such as pincer grip and hand-eye coordination.

7. Watch as the hearts bubble and fizz as the chemical reaction takes place.

Repeat steps 6 and 7 until all of the hearts have melted away and won’t bubble anymore. Or until your children have finished exploring.

How do Fizzy Heart Bombs Work?

When combined together, baking soda and vinegar create an eruption of bubbles that can be both entertaining and educational. 

The most simple explanation to give your kids is that when you mix baking soda and vinegar together, it makes carbon dioxide and water. The carbon dioxide in the water is what creates all of the bubbles that they see.

However, the main lesson for younger kids to learn from this activity is that science is fun. You don’t need them to understand the chemistry behind this reaction when they are still preschoolers. But you do want to get them excited about learning and school.

More Valentine’s Day STEM Activities

If you love science, then check out some of these other Valentine’s Day themed STEM activities for kids. These are perfect for at home or in the classroom.

1. Magic Heart – Invisible Ink Activity for kids
2. Free Valentine’s Pattern printable for kids
3. Free Valentines addition worksheet
4. Building Candy Structures (Valentine’s STEM)
5. Light Up Circuit Valentine’s

You can also take a look at these 8 Valentines STEM for Kids for more inspiration.

Are you going to make these Fizzy Heart Bombs with your kids? Don’t forget to pin the idea for later.

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