From the early '2000s, until around 2010 or 2011, during the PBS Kids block on WGBH-2 or on WGBH Kids, in program breaks, there were clips of kids saying "WGBH Kids like me!" or "GBH Kids like me!" I don't have any footage or screencaps of the bumpers, but I do remember them from my childhood and I'm hoping someone who has WGBH recordings from those years has these bumpers.