Here's a terrific little robot that made a single appearance in Weird Fantasy #15  in 1950. The Goon-Child is the creation of Henry, who constructs this rather simply robot to do menial chores around this house. It turns out that the Goon-Child isn't all that keen on being a slave and upgrades his design to the point where he can revolt against his slob of a master. There's a terrific 'They call me Mr. Tibbs' moment and I find it quite comical that Henry is overpowered by a robot who looks like an ancestor of Johnny Five. All of this is handled beautifully by Harvey Kurtzman who balances humour with a sense of threat. A true classic.
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