He farts! She farts! We all fart--but why? Combining real science with humor, Farty Pants explains it all--complete with full-color illustrations and hidden buttons that trigger ten unique fart sounds. Each sound relates to a humorous fact on the same page. Were farts always taboo? Did kings and queens fart? Is there a difference between baby and grandpa farts? Learn all of this and more with facts that cover their loudness and speed, as well as how farts work differently in water, space, and beyond!