You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: THE NATIONAL TOY HALL OF FAME
Clue: Initial sales for it were sluggish, but demonstrations of how it walked down stairs at Gimbels made it walk off shelves
a slinky

Category: BESTSELLERS
Clue: "Gettysburg", cowritten by this former House speaker, imagines a Confederate victory at Gettysburg
newt gingrich

Category: ODDS & ENDS
Clue: It's the city where the Francis Scott Key Bridge spans the Patapsco River estuary
baltimore