What Is the Fleron Signaler?

At first glance, I thought it was a Kodak box of some kind, based on the colors, but I soon figured out it wasn't.


A little research revealed that it was a Boy Scout toy (or tool), used for teaching Morse code in the early days of radio. Aside from the lettering, which is beautiful, the thing that I like best about the package is the wording on the left side: "It's interesting • It's profitable • It's fun."

Profitable?