The series premiered in 1897. Stopped in 1950.
The strip was inspired by the German author Wilhelm Busch's story Max und Moritz, and it focuses on two young twins, Hans and Fritz, who are unscrupulously mischievous and highly destructive. Their parents (who have no names) are mentioned as Mama and Captain, and a school representative (also nameless) titled Inspector complete the primary character gallery. All the adults are targets for the kids' highly strung mentalities.