It is fun to sharpen your creative wits. The puzzles in Aha! do not require any special knowledge or vocabulary. The answers usually come with sudden insight. These "aha effects" are critical components in innovative problem-solving. Worthy believes that such thinking is a knack that can be nourished and strengthened. Most of all, though, the puzzles are meant to be enjoyable—a place to play, and let your mind show you how fun it is to think.
