To create a "DECODE RED" activity—a popular project where a hidden message is revealed using a red filter—follow the steps below. This activity is designed to take roughly to complete. Materials Needed Paper: White construction paper or cardstock.
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) DECODE RED - Part 222:26 Min
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! To create a "DECODE RED" activity—a popular project
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) Cut a piece of slightly larger than the
One light blue (or green) marker and one bright red marker.
The goal is to cover the blue message enough that it is no longer readable to the naked eye. The red ink should look like a chaotic jumble of lines or shapes.
Red cellophane paper or a transparent red plastic sheet. Scissors and Tape/Glue: To create the "decoder lens". Step-by-Step Instructions Prepare the Decoder Lens (5–10 Mins)