Color-Changing Water

This Color-Changing Water is a super easy STEM activity with household materials. Mixing two colors together to make a different color has a magic-like effect, especially for little kids. 

Age: 3+          Time: <10min


1. Be careful with the fragile glass.
2. Adult supervision.

 Materials List 

  • Transparent bowl
  • Glass jar
  • Water
  • Food coloring
  • Glass rod


Step 1/3 – Add drops blue food coloring to a glass of water, add yellow to the other glass. Stir them separately up.
Color-Changing Water STEM Activity

Step 2/3 – Pour blue water to the bowl about 3/4 full.
Color-Changing Water STEM Activity

Step 3/3 – Put the glass jar in the center of the bowl and add yellow water to the glass. Observe the color through the bowl.
Color-Changing Water STEM Activity
Color-Changing Water STEM Activity

 Scientific Description 

All the colors we see are compounded by three basic colors, yellow, blue, and red. When you look through two colors, the colors “mix” together to create a new color. In this experiment, when we looked through the bowl, two colors, yellow and blue, combined into a new color, green.


  1. Can other colors mix together into a new color?
  2. What color can you see when you replace the green water with a solid green objective?  
Color-Changing Water Color-Changing Water Reviewed by Ronyes Tech on May 13, 2020 Rating: 5

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