For each Cub Scout to be recognized, prepare a sheet of paper with a "Secret Message" on it, by writing on it in milk or lemon juice (as shown in the Wolf Cub Scout book). When the paper is held carefully over a heat source such as a light bulb, the message will appear:
Examples: Great job, Brian! Now aim for Bear.
Congratulations, Chris, you have earned your Bobcat.
Go for the Arrow of Light, Michael!