Munchkin (A Series of Queer Events)
From Jenny Everywhere Wiki
In one version of the Land of Oz, Professor Wogglebug tested his Information Pills on a Munchkin volunteer whose head “combusted from all the information implanted into their brain”. Thanks to the magic of Oz, however, this did not kill them, and their head was efficiently replaced by a balloon with a smiley face painted on it. (PROSE: A Series of Queer Events)