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What You Need for Tie-Dye Milk:

  • milk
  • eco-friendly liquid dish soap
  • water
  • toothpick
  • natural food coloring

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Step 1: Pour the Milk

In a shallow dish, bowl enough milk to cover the bottom of the dish.

 

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Step 2: Mix the Water and Liquid Dish Soap

In a separate cup, mix a 1/2 cup of water with a squirt of eco-friendly liquid dish soap.

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Step 3: Add a Little Color

Add several different drops of food coloring to the milk.

 

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Step 4: Get Tie-Dying

Dip the end of the toothpick into the liquid dish soap mixture, then touch (don’t stir!) the end of the straw to the surface of the milk mixture.

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Step 5: Watch!

The detergent mixture will break the surface of the milk causing the food coloring to swirl by itself. Magic!

 

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Why it Works?

The surface of the milk is thick like a skin and the dish detergent is what breaks it. The food coloring and milk break through the surface when the liquid dish soap mixture hits the milk causing the swirling. This experience teaches children about surface tension.