It’s a delightful volume, featuring stories like A Giant Bottom, The Big Poo, The Enormous Wee, The Big Fire Burp and The Pond of Sick.

The Ugglys, made by Moose Toys, not only fart and burp, but make about 30 other repulsive noises. "Gross is a shock factor," says Moose Toys co-CEO Paul Solomon.

How much farting is normal? It might not seem polite, but everybody farts - some people more than others. Like burping, it can sometimes be caused by swallowing too much air or the foods you eat.