Pretty much all books, history, science, civil rights, anime, travel, or, you know, baby animals.
I read the title story, "The Smallest Dragonboy," in a school anthology in third grade (I think), and it changed my life. I already read all the time, but it was more a case of exercising my mind; this was the first story that touched my heart. I paid no attention to author's names then, and as the story was mixed in with so many others I probably didn't even learn it.