On the Tiny Planet of Technology, Bing attempts complicated tricks with a yo-yo as they watch construction robots building a pair of houses. The trick fails, as the yo-yo soars through the air and lands on the roof of one of the new homes, string dangling over the edge. Looking at the string in relation to the two homes, Bing and Bong realize that one house is straight and the other crooked. They then use the yo-yo string as a plumb line in making all adjustments necessary to realign the crooked house. When a Crooked Flocker shows up unable to walk inside the perfectly straight door, Bing and Bong use the yo-yo/plumb line to help the Flocker stand up straight, too.

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