One light blue (or green) marker and one bright red marker.
Use a to scribble, doodle, or write "decoy" words directly over your blue/green message. DECODE RED - Part 222:26 Min
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. One light blue (or green) marker and one bright red marker
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 DECODE RED - Part 222:26 Min