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Valentine's Day Secret Messages




Make this fun secret message for that special someone.

When you're finished, make a Secret Message with Sunglasses.


  • Paintbrush
  • Sponge
  • Baking soda
  • Water
  • White watercolor paper
  • Decorative paper and card stock
  • Self-adhesive laminating sheets, or laminating machine
  • Double-sided tape
  • Spray bottle
  • Grape juice (The acid in the grape juice reacts with the baking soda, which is a base, to change the color of the paper, revealing the message.)


  1. Step 1

    In a small bowl, mix equal parts baking soda and water.

  2. Step 2

    Using a paintbrush, write a secret message with the baking soda mixture on a piece of white watercolor paper. You should be able to see the message while it is still wet; if it's hard to see, look at the paper at an angle as you write.

  3. Step 3

    Allow the message to dry completely (about 10 minutes).

  4. Step 4

    Brush off excess baking soda residue with a dry sponge. 

  5. Step 5

    To make a water-resistant card, cut pieces of decorative paper or card stock slightly bigger than the secret message paper. Sandwich the card between 2 sheets of laminate material, or run it through a laminating machine.

  6. Step 6

    Using double-sided tape, attach the watercolor paper with the invisible message to the top of the laminated card.

  7. Step 7

    Present the card with a spray bottle of grape juice. Instruct the recipient to spray the grape juice on the card to reveal the secret message. Note: The message must be lying flat until dry or the grape juice (and message!) will drip off.

The Martha Stewart Show, February 2008



Reviews (8)

  • jketzel 4 Feb, 2011

    BellTree, did anyone tell you where you can go to make different msg. to read with the glasses. I was thinking the same thing when I was this. I would love to know how to have the msg. say something else. Please let me know.

  • tyost12 2 Feb, 2009

    click on the print button at the top above the video and you'll be able to access the templates.

  • Yvelle 2 Feb, 2009

    Does anyone know where to find the templates for this?

  • kimnamsoon 20 Feb, 2008

    Love this idea!!!! Thank You!!!!

  • gailrathbun 18 Feb, 2008

    Is there a program they used to make the hidden messages? How do you make them?

  • BellTree 15 Feb, 2008

    Does anyone know how to make other messages to be read with green cellophane glasses?

  • PreciousIittleOnes 13 Feb, 2008

    what she is saying that you take baking soda add water and with the paint brush paintied and then take the gtape juice and spray it on it but before you add the grape juiuce yyou need to let the the paper dry before you add grape juice if you wacthed her show today you would know what she did in her show today :)

  • Paperwanda 13 Feb, 2008

    How is the baking soda - grape used ...I don't see anything in the instructions