Heart Magic Milk Experiment

Do the kids love the thought of adding a little bit of magic to their day? This Heart Magic Milk Experiment is so much fun! Just in time for Valentine’s Day, the kids will have a blast making and playing with this experiment over and over again.

What I love about this experiment is that it’s great for all ages to join in on the fun. Since we do a lot of projects and activities at home, I really hate the idea of excluding any of the kids and trying to think of things that we can all do together. This one does just that and it’s awesome!

If you’re looking for a super fun experiment that will get the kids excited and ready for Valentine’s Day, try this one then check my list of awesome Valentine’s Day Science Activities for more!

heart magic milk experiment

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Heart Magic Milk Experiment

With just four simple supplies, you can bet that this activity is simple and easy to do. The kids will love being able to take over and make their own magic milk activity.

Make sure to check out my Fun Fizzy Apple Volcano Science Experiment, too, for even more messy play and fizzy fun!

It’s fun when they reach this age where they can show you how to do things. As long as you’re there with them, it’s great to sit back and see how they do!

Having easy experiments for kids is perfect for teaching them confidence. You can use this activity as a great one to start. Since it’s simple to do, there aren’t a ton of directions and instructions for them to follow but there are enough that they feel important and successful once they do them!

Want a fun ready to go Valentine’s kit that will delight your kids? Grab one of these craft or play dough kits from Etsy. They’re super adorable and a great way for new play ideas at home!

Why make experiments at home?

No matter if the kids homeschool or go to school, making experiments in the house is always fun to do. This gives them the chance to get some hands-on learning in a way that they might not have had before.

Ask them if they’re excited and talk to them about what they think is going to happen. This is a simple way to get them involved and curious about the experiment as well. You can even tell them that they’re starting to think like a scientist and let them make hypotheses along the way.

Supplies needed to make this Magic Milk Experiment

All you need are the following supplies to get started. The kids will be showing off their skills in no time at all!

  • Liquid dish detergeant
  • Food coloring
  • Milk
  • Cotton swabs or cotton balls
supplies needed for magic milk

If you have a heart-shaped dish, this is perfect for Valentine’s Day! (and the whole reason that it’s a magic heart experiment!) However, don’t scrap it completely just because you don’t. Any shape dish or bowl will work for this experiment.

Just make sure that it’s shallow and easy for hands to get to the milk in the middle.

adding the food coloring to the milk

Let the kids pour in the milk and then add the dots of food coloring around the outer edge of the container. Space them out and let them make the decision on where to put them.

putting the soap in the middle of the milk and food coloring

Once that’s done, dab a bit of the dish detergent on the cotton swap or the cotton ball and stick it right into the middle of the milk.

What everyone will start to see happen right away looks like magic but it’s actually a reaction that is happening between the added ingredients of this experiment.

watching the food coloring marble

As you can see, the outcome creates a super fun marbled look that the kids are sure to love. It’s a fun and easy way to make a STEM activity at home using minimal supplies and time. The kids will have a blast creating this activity all on their own!

What are some fun ways to try and expand this activity?

Since this magic milk experiment is fast to do, think of ways that you can expand it to have the kids do even more things.

See what happens if they try and use different colors of food coloring. Does the experiment still work the same or does it only work this way with the color red?

Find out if they’re able to make a rainbow of colors in the milk and challenge them to find a way to make it happen. This helps them use critical thinking skills and can make a really cool activity even cooler!

Another way to expand on this activity is to try and use different types of soap. Does it have to be liquid soap for this activity to work or will any old soap work?

Can they use powder soap? Try and find out! The best part of being a scientist and creating is to pivot and correct the mistakes.

Fun Ideas For The Kids To Learn More With STEM

I also think that a really fun way to get even more out of this lesson is to have the kids write down their thoughts in a journal. Have them write it down on their own and then talk about what they think will happen.

If they’re too little to really write out the words, no worries at all. Have them draw what they think is going to happen and then explain their pictures to you.

Scientists all have journals and are great at keeping track of what happens, what they need to tweak, what they want to alter, and the plan to move forward with the changes.

Are you ready to get started on this fun magic milk experiment? It’s such a simple way to create some unique family fun.

watching the food coloring marble

Heart Magic Milk Experiment

This fun heart magic milk experiment is so much fun for the kids!


  • Milk (about 1 cup)
  • Food coloring
  • Liquid dish detergent
  • Cotton swabs or cotton balls


  1. Fill a shallow container with milk.
  2. Drop the food coloring around the edges.
  3. Dip a cotton swab or cotton ball in dish detergent. Then place in the middle of the container to activate the magic marbling.

More Fun Valentine’s Activities for the Kids

Don’t forget to check out even more fun activities for the kids! Once they get started, they’re not going to want to stop! The sooner that you can start creating and working your way down the list, the more that they’re going to want to create and have fun, too!

Simple Heart Experiments

Looking for a way to incorporate science and Valentine’s Day? Here is a list of simple heart experiments that are Valentine’s Day-themed!

Valentine STEM Activities

Must-try Valentine’s Day Activities for Kids

Valentine’s Day Multiplication Puzzles

Valentine’s Day Counting Cards and Puzzles

Valentine’s Day Counting Mats

LEGO Heart Valentine by STEAMsational

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