When did frank Henry fleer invent bubble gum?

Ordinary gum doesn't blow bubbles, as you probably already know. Nobody knows exactly who or why somebody would have thought of blowing bubbles with it. But when chicle gum got to North America, grown men wanted to make a kind of elastic gum that could blow bubbles.

In 1906 a man named Frank Henry Fleer developed a kind of gum that did that.