"Kinderlumper" is a song from the "Der Kinderlumper" sung by Dr. Doofenshmirtz. Originally sung by his mother to him, it tells the Drusselsteinian fairy tale of the ferocious Kinderlumper, who takes misbehaving children and puts them in his gundersack. A version presenting the Kinderlumper as a positive figure is partially sung byRoger later in the episode; this version was also taught by their mother.

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