When the town council of Cayuga Ridge decides to hire Slappy Hooper to paint a sign advertising their annual Cow Fair, they know they've gotten the world's greatest sign painter. In fact, Slappy has been known to paint portraits so real that the pictures themselves actually tell you where they'd like to be hung. Armed with gadgets and gizmos galore, Slappy sets to work on his grandest sign ever. What does the larger-than-life Slappy come up with? Well ... let's just say that there is a surprise winner of the Cow Fair, and the creative sign painter deserves his title: Slappy Hooper: The World's Greatest Sign Painter!