🌈  Rainbow Walking Water

🧪 Materials:

  • 6 clear cups or jars

  • Paper towels (cut into strips)

  • Water

  • Red, yellow, and blue food coloring

👩‍🔬 Instructions:

  1. Line up the 6 cups in a circle or straight line.

  2. Fill every other cup with water (cup 1, 3, and 5).

  3. Add a few drops of red to cup 1, yellow to cup 3, and blue to cup 5.

  4. Place paper towels between each cup, dipping both ends into the water.

👀 What to Look For:

After a few hours, the colors “walk” up the paper towels into the empty cups and mix to make new colors!

🔍 What It Proves:

This shows capillary action — how water moves upward through narrow spaces, like in plant stems. It also introduces color mixing.

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