is a 2007 non-fiction children's book written and illustrated by Charise Mericle Harper.

The book contains two-page chapters with rhyming text, color illustration, and factual side-bars.

Published for school children between grades 2 and 4, the book uses humor to describe the history of human waste.

In a review published on Booklist, Connie Fletcher said, "Harper's picture-book overview of the evolution of excrement disposal--from the invention of toilets 'over 10,000 years ago' to toilets in space--has everything some kids delight in: shock value, weird facts, and gross-out references.

"[2] Kitty Flynn of Horn Book Magazine said, "With their Kalman-esque color combinations, Harper’s engaging, idiosyncratic collage paintings help set the tone and, like the poems, manage to be both irreverent and edifying.