Magic milk is one of our favorite science activities because of the endless possibilities for creation. Add some heart shapes and you have a Valentine’s Day science activity that is irresistible! The kids love watching the colors erupt, scatter, and mix. It is sometimes unpredictable, which makes it exciting and new each time.

Magic milk hearts is a Valentine's Day science variation on the classic experiment. It's a little bit science, a little bit art, and a whole lot of fun!

Valentine’s Day Magic Milk

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We started by gathering the following supplies:

Magic milk hearts is a Valentine's Day science variation on the classic experiment. It's a little bit science, a little bit art, and a whole lot of fun!

Then we followed these directions:

  • Place a heart cookie cutter in a dish or baking sheet.
  • Pour milk into the cookie cutter. It will leak out into the dish, and that is fine. You don’t want or need much, just a thin film that covers the bottom.
  • Squeeze a few drops of food coloring or liquid water colors into the milk. Add glitter, if desired.
  • Dip the end of the toothpick into the dish soap and then into the center of one drop of colored milk. Don’t stir it! Watch the color erupt and swirl inside the heart.
  • Repeat and enjoy.

We posted a video of Valentine’s Day Magic Milk on Instagram. Hop on over to see this amazing project in action!

Magic milk hearts is a Valentine's Day science variation on the classic experiment. It's a little bit science, a little bit art, and a whole lot of fun!

Valentine’s Day Science Explained

Why do the colors explode when you add dish soap to the milk?

Put simply, the dish soap disrupts the molecules at the surface of the milk, making them spread out. This makes the colors spread out, leaving a beautiful marbled pattern behind.

When soap is added to milk, one end of a soap molecule grabs onto a fat molecule in the milk. With millions of molecules finding a partner all at once, the mixture gets all stirred up! It looks like the milk is erupting for a minute or more after dish soap is added. It truly is magic milk!

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By | 2017-04-11T21:49:34+00:00 January 23rd, 2016|Art, Five Minute Science, Kitchen Science, Science, STEM Saturday, Valentine's Day|2 Comments

2 Comments

  1. Alison January 31, 2016 at 4:19 pm - Reply

    What a fun and festive activity!

  2. Adventures of Adam February 1, 2016 at 6:39 am - Reply

    What a brilliant Valentine experiment and a great explanation too.
    Thank you for linking up to #ToddlerFunFriday

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