During the American Revolution, General George Washington used spies to win the war against the British. American Spies were people who would find out what the British were up to and send word to General Washington. These messages could be a warning that the American army would be attacked or where the British were going.
To hide these messages, American spies would use invisible ink. Some spies would dip their quill in lemon juice and then write the message on paper. When the paper was introduced to heat the secret message would appear.
Activity - Create Secret Messages Using Invisible Ink
What You Need
Blank white paper
Using the white crayon, write a secret message on the blank piece of paper. Try pushing down hard on the paper with the crayon. After the message is written, have your History Tot color over the white crayon writing with the marker to reveal the secret message.