This St. Patrick’s Day engage the kids in magic leprechaun science using just three common ingredients found in your kitchen. Art and science in one!

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The tricky leprechauns are at it again! This time they have used their magic to produce leprechaun science. Using just three common ingredients found in your kitchen, you, too, can perform magic leprechaun science that will delight and dazzle the kids this St. Patrick’s Day.

This St. Patrick

This science experiment is frequently called magic milk or marbled milk. It is one of our family favorites because it a little bit art, a little bit science, and always a ton of fun for kids of all ages. We love to customize the colors and shapes for each holiday or season. (Check out our Valentine’s Day Magic Milk here.)

Leprechaun Science


Milk (we used whole this time, but anything from skim to full cream will work)

Shamrock Cookie Cutter

Green Food Coloring

Liquid Dish Soap


  • Pour milk into a flat dish.
  • Place the cookie cutter in the milk.
  • Drop 1-2 drops of food coloring into the center of the cookie cutter.
  • Carefully drip one drop of liquid dish soap into the center of the food coloring. Don’t stir it! What happens?
  • You can pick up the cookie cutter and move it to repeat this fun leprechaun science in another section of milk. Do it over and over again!
This St. Patrick

Magical Leprechaun Science Explained

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

Put simply, the dish soap interrupts the molecules at the surface of the milk, making them spread out. This makes the colors spread out, leaving a beautiful marbled pattern behind. You can read my full explanation here if you are interested. The science behind what you see in magic milk is pretty fascinating!

This St. Patrick


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By | 2017-02-27T21:40:56+00:00 March 12th, 2016|Art, Science, St Patrick's Day, STEM Saturday|0 Comments

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