The South Dakota State Fair is different every year and yet it never really changes. It's a capstone experience for hundreds of 4-H kids earning ribbons by showcasing their skills - from photography to poultry to pickles. The State Fair is midway food like corn dogs and funnel cakes. It's demonstrations of super-sharp but amazingly affordable cutlery, the latest in farm machinery, and so many other (mostly) useful things. It's carnival rides and games and the mingled smells of popcorn, sheep,