Spy Games for Kids – Create Your Own Invisible Ink in 4 Easy Steps

Secret messages, treasures maps, and notes that big brother or sister isn’t allowed to read – those are a few of the many reasons why young kids need to know how to make invisible ink!  Luckily for Mom, it’s easy, non-toxic, and shouldn’t make a big mess.  You only need two ingredients – baking soda and water.


Step 1.  Mix equal parts water and baking soda.

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Step 2. Dab a cotton swab, toothpick, or paintbrush into the mix.

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Step 3. Write a message onto white paper using the baking soda solution as the ink.
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Step 4. Allow the ink to dry thoroughly.
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Reading the message is easy, and there are two ways to do it. The first is to hold the paper up to a heat source. An incandescent light works perfectly for this. The baking soda will cause the writing on the paper to turn brown.
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The second option is to paint over the message with purple grape juice. The message will appear in a different color than the juice.

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The instructional portion of this article was provided by wikiHow, a wiki building the world’s largest, highest quality how-to manual. Please edit this article and find author credits at the original wikiHow article on How to Make Invisible Ink. Content on wikiHow can be shared under a Creative Commons License.


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