One light blue (or green) marker and one bright red marker.
On a separate piece of white paper, write your secret message using a . Keep the letters clear and thin. Create the "Red Noise" Camouflage (10 Mins) DECODE RED - Part 222:26 Min
Place your red decoder lens over the paper. The red filter will make the red marker "disappear" into the background, while the blue or green text will appear dark (nearly black), making the secret message clearly visible. Alternative Method: Invisible Ink One light blue (or green) marker and one bright red marker
If you don't have red cellophane, you can create a "heat-decode" paper using . Write your message with juice and a brush; once it dries (about 15–20 minutes), hold it near a heat source like a lightbulb or iron to turn the writing brown and "decode" it. Write a Secret Message with Matt! Create the "Red Noise" Camouflage (10 Mins) Place
Use a to scribble, doodle, or write "decoy" words directly over your blue/green message.
Cut a piece of slightly larger than the hole and tape or glue it over the opening. This will act as your "secret lens" that reveals the hidden text. Write the Secret Message (5 Mins)