Dancing Candy Heart Experiment

The dancing candy heart experiment is a must-try Valentine’s Day STEM activity! Watch as candy hearts bubble, rise, and fall in a fizzy reaction.

Table of Contents:

1. We love a good dancing candy heart experiment
2. What is a dancing candy heart experiment?
3. Materials
4. How to do a dancing candy heart experiment
5. Questions to ask your child during this experiment
6. Will a candy heart dissolve in water?
7. Can you hear the sizzling sound?
8. Your turn to try this candy heart dancing experiment
9. Frequently Asked Questions

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We love a good dancing candy heart experiment

You have probably seen this done online before with corn (fun fact: we did this before with corn, and Arm & Hammer reached out to us to ask if they could use our video!), and candy hearts are pure joy.

I remember the first time I did this project and I was absolutely stunned.

I have done a bazillion baking soda and vinegar experiments in my life, but this was a COMPLETELY different way to use them. It’s amazing.

💕 Related: Don’t miss our spectacular collection of the 25+ best preschool Valentine’s Day activities.

What is a dancing candy heart experiment?

In short, you add materials into a clear jar or vase together and they make the candy hearts move all around your jar.

We love that you can do this over and over again, and because it doesn’t use that much baking soda or vinegar, you can restart it several times in a row.

💕 Looking for more fun baking soda and vinegar activities?

• Plastic Easter Egg Science
• Bubbling Easter Jelly Beans
• Fizzing Valentine’s Day Hearts
• Hidden Colors

Materials

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• Baking soda
• Vinegar
• Candy hearts
• Clear jar or vase
• Water
• Spatula or long spoon

How to do a dancing candy heart experiment

Begin by filling your jar about ¾ full with water and add in a couple of tablespoons of baking soda.

Note: I have found that room temperature or slightly warm water works better than cold for dissolving the baking soda.

Stir with your spatula or long spoon until the baking soda is completely dissolved, occasionally stirring if needed (it takes about one minute).

Next, add in a handful of candy hearts. Before adding them in, invite your child to predict whether they think they’ll float or sink.

Last, add in the vinegar a tablespoon or two at a time. Do not add the vinegar too quickly (like I have done, ha!) or it will bubble up, over the sides of the container and onto your table. You know what, do this over a sink or tray just in case. 😂

As the vinegar mixes into the baking soda water, you’ll see bubbles and soon the candies will start to dance! The candies will float to the top of the water, sink back down to the bottom, and repeat over and over again. Sometimes, we stir with a spatula or spoon to mix and make them move even faster.

Questions to ask your child during this experiment

• What do you think will happen when we add the baking soda to the water?
• Why does the water become clear again after adding the baking soda?
• What do you think will happen to the candies?
• Why do the candies move up and down in the jar?
• How can you make the candies move faster?
• What would happen if you added even more baking soda?
• What else could you add to the jar beside the candies?

Will a candy heart dissolve in water?

Put it to the test! Invite your child to make predictions about how long they think it will take the candy heart to dissolve (if even possible) completely.

Note: the candy hearts don’t dissolve quickly, so kids can observe the candy hearts dancing for quite some time. When we did this with corn, one time they danced for an hour.

Can you hear the sizzling sound?

YES! This is my favorite part. No matter how often I do baking soda and vinegar experiments, the actual sizzling sound is the best part of it all to me.

Ask your child to compare the volume of the sizzling sound during the experiment. During some parts, the sizzling is loud and easy to hear. At other times, it’s quiet and you have to listen closely.

Your turn to try this candy heart dancing experiment

And we can’t wait to hear what you think about it. It’s simple, quick, low-mess, and abundantly fun.

If you have any candy hearts left over, check out our other candy heart activities like candy heart oobleck and candy heart science trays!

Frequently Asked Questions