Kid Activities

Invisible Ink Science Activity

Activity Details

Prep Time: 5–10 minutes
Activity Time: 15–20 minutes
Age Range: 4+ years
Mess Level: Low

Instructions

Step 1Step 1: Write Your Message 1. Mix baking soda and warm water in a small bowl. 2. Use a cotton swab or paintbrush to write your message on paper. 3. Let it dry completely—the writing will become invisible.
Step 2Step 2: Reveal the Message 1. In a separate bowl, mix turmeric with hand sanitizer. 2. Paint the mixture over the dried paper. 3. Watch the hidden message appear as it turns red!
Step 3What’s Happening? Baking soda is a base, and turmeric is a natural indicator. When they react, the color changes—revealing your hidden message like magic. Affiliate link to incorporate in post: https://geni.us/EOYEJ

Supplies

  • Invisible Ink
  • • 1 teaspoon baking soda
  • • ½ cup warm water
  • • Cotton swab or paintbrush
  • • Paper
  • Reveal Solution
  • • ½ teaspoon turmeric
  • • ½ cup hand sanitizer

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