Have you ever wanted to send a message to someone but did not want anyone else to be able to read it? In this activity, you can pretend to be a secret agent and send a special message to a family member or friend. For this activity, you will need lemon juice, Q-tips, paper, and an iron or a hair dryer(a heat source). Since you will need some heat for this science experiment, you will need to have a adult around to help you. In this activity, you will use the lemon juice to write your secret message. When the lemon juice dries on the paper, you will not be able to read it. Now, here is where the fun starts! Use the hair dyer or the iron to add some heat to your paper. What happens to the message you wrote? For more information about this activity, watch the video and click
here.