Packy the Packrat s mother has had enough! It s time that he sorts through his ever-growing collection of trinkets and puts them away. Told in rhyme, the text leads the reader to participate in the sorting process by categorizing Packy s piles of things according to like characteristics and attributes. The reader response is worked into the rhyme, building a sense of anticipation. The illustrations include a humorous subplot about Packy s sister, who enjoys pilfering some of his things for her own enjoyment. Children will relate to the idea of having a collection of favorite objects and the satisfaction that comes from examining and admiring these collectibles. The story promotes and reinforces analogous thinking a critical thinking skill in math, science, and life.