A few months ago, as I was driving around town with my children, I heard my four-year old shout. "Look! The letter T!" As it happened to be the letter of the week in her preschool class, she was on the lookout for it. So it was that construction cranes, perched atop a building, formed the shape of the letter T.
Indeed, letters are shapes. And if you just look, they can be found everywhere. Fifteen years ago, Stephen Johnson wrote a Caldecott Honor book entitled Alphabet City. The children's book consists of photographs of objects and architectural elements found in a city that each form a letter of the alphabet.