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.

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!

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!

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!

Recommended Valentine’s Day Books

Bring more excitement to the season with these Valentine’s books for kids. You will love these great stories about hearts, love, and Valentine’s Day.

Day It Rained HeartsDay It Rained HeartsThe Biggest Valentine EverThe Biggest Valentine EverTurkey's Valentine Surprise (Turkey Trouble Book 6)Turkey’s Valentine Surprise (Turkey Trouble Book 6)There Was an Old Lady Who Swallowed a Rose!There Was an Old Lady Who Swallowed a Rose!A Crankenstein ValentineA Crankenstein ValentineLove, EscargotLove, Escargot


Recommended Valentine’s Day Activity Kits

Valentine’s Day Color by Addition Worksheets

Practice addition skills up to 20 with these fun Valentine’s day color by number addition worksheets. A fun way to add math to your school day without boring math worksheets. Instead, figure out what picture will unfold after you color in each space.

Little Learners Print & Go Activity Kit: Valentine’s Day

Valentine’s Day is here and learning can be turned into a fun heart’s day for kids. Get this huge pack of printable math and literacy activities for your young learners at home!

watching the food coloring marble

Recommended Valentine’s Day Craft Kits

These Valentine’s Day craft kits will help your kids appreciate and love Valentine’s season more. This will also enhance their motor skills, and creativity while expanding their imagination.

24 Pack Kid's Valentine's Day Cards with 5D Diamond Painting Sticker Kits24 Pack Kid’s Valentine’s Day Cards with 5D Diamond Painting Sticker KitsHaooryx 24 Pack Tree of Hearts Valentine Craft KitHaooryx 24 Pack Tree of Hearts Valentine Craft KitDeluxe Kids Valentine's Day Cards - Heart Themed Fuse Bead KitsDeluxe Kids Valentine’s Day Cards – Heart Themed Fuse Bead KitsValentine Heart Charm Bracelet Craft Kit - Crafts for Kids and Fun Home ActivitiesValentine Heart Charm Bracelet Craft Kit – Crafts for Kids and Fun Home ActivitiesValentine Cookie Foam Magnets Craft Kit - Makes 12 - Valentine's Day Crafts for KidsValentine Cookie Foam Magnets Craft Kit – Makes 12 – Valentine’s Day Crafts for KidsWilton Candy Bracelet Kit-Valentine's DayWilton Candy Bracelet Kit-Valentine’s Day


Want a fun ready-to-go Valentine’s kit that will delight your kids? Grab one of these Valentine’s Day foam craft kit! 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, doing 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 detergent
  • Food coloring
  • Milk
  • Cotton swabs or cotton balls
supplies needed for magic milk

How to make Heart’s Day-themed magic milk experiment

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.

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 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.

watching the food coloring marble

Heart Magic Milk Experiment

Prep Time: 10 minutes
Active Time: 30 minutes
Total Time: 40 minutes
Difficulty: Easy

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 of your container.
  3. Dip a cotton swab or cotton ball in dish detergent. Then place in the middle of the container to activate the magic marbling!
  4. Voila! See how to magic happens as the dish detergent creates a reaction to the food coloring and milk!

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

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 they’re going to want to create and have fun, too!

Valentine STEM Activities for Kindergarten

Simple Heart Experiments

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

Valentine’s Day Paper Plate Craft for Kids by Homeschool Preschool

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