From a review that came out today:
In "Niagara Falls, or Does It?" the first book in the series, Hank is assigned a five-paragraph essay describing what he did over summer vacation.
Writing five paragraphs, for Hank, is "like climbing Mount Everest with no clothes on," said Winkler. So Hank builds a model of Niagara Falls as a "living essay," explaining and showing what he did on his summer vacation, instead of writing.