Part of the Gross Science series, here's a book flush with facts on the number-one topic of interest to kids: going number two! Overflowing with the science and history of poop (and pee), Poopy Science covers everything kids ever wanted to know (and more!) about their favorite subject.
Both expertly researched and hilarious, this book starts with human waste, including: what's in our poop, how our digestive system works, what poop can tell us about our health, and the history of sanitation.
