Invisible Ink!!!

Ever want to create a top secret message??? Well now you can! And you can use science to do it!

Enjoying using chemistry and the following readily available kitchen items to send secret messages to your buddies!

Here's what you need to get started:
baking soda
paper
water
paint brush (or you can use your finger)
measuring cup
purple grape juice concentrate


Directions:
Mix water and baking soda in a bowl in equal quantities. Be sure to use your measuring cup here.

Then use a paint brush or your finger to paint on your top secret message to paper.
Note: you won't be able to see what you are writing! That's what makes it top secret!

Allow message to dry.

Next, to have your secret messaged reveled paint over you message with grape juice.

YOUR MESSAGE WILL MAGICALLY APPEAR!

Well, not exactly magically... 

Here is what happened:

The baking soda and water mixture you used to paint on your message constitutes a weak base.  Weak bases have high pH values and do not ionize fully.  Grape juice is an acid.  The message is written in a weak base, and this weak base neutralizes the acid in the grape juice, therefore, revealing your message! 

Enjoy sending secret messages!