I REMEMBER SEEING IT! And so does this Wiki, since they list Princess Bubblegum as a PBS Kids Character: https://parody.fandom.com/wiki/Category:PBS_Kids_Characters
I remember reading about it. AT had a pilot on Nickelodeon, but they passed it up. Ha ha! I guess they wanted more tween-coms produced by that creep Dan Schneider.
In place of commercials, I heard there were interstitial educational segments with Jake, BMO, and others.
I REMEMBER SEEING IT! And so does this Wiki, since they list Princess Bubblegum as a PBS Kids Character: https://parody.fandom.com/wiki/Category:PBS_Kids_Characters