People tend to "give her things" and her home is filled with knick-knacks such as pink skulls and rude garden gnomes that serve no useful purpose except to highlight her eccentricities. Her family brings back souvenirs for her whenever they go more than a few miles from home. Since she doesn't care whether they're cheap or not, she has several things with legends such as "To The World's Greatest Mum" on them. She shares this home with Greebo, a tomcat of evil aura, aroma, and astonishing viciousness, whom she (and only she) sees as the fuzzy harmless kitten he arguably must once have been. In "The Art of Discworld", Pratchett says, "I've always suspected that Nanny is, deep down, the most powerful of the witches and part of her charm lies in the way she prevents people from finding this out." Indeed, incurring Nanny's wrath is suggested to be much more dangerous "because" of her reflexively kind personality. In Pratchett's short story "The Sea and Little Fishes" Nanny Ogg also identifies herself, and the Ogg family as a whole, as having immense natural magical talent, but as less willing to work it as hard as Weatherwaxes do. Within the Discworld universe, Nanny has written several books: "The Joye of Snacks", "Mother Ogg's Tales For Tiny Folk" and "Nanny Ogg's Cookbook". The first two were withdrawn after the publisher discovers (by personal demonstration) what the dishes described in the recipes did; the third survived with heavy editing. Nanny enjoys food and drink despite only having one remaining tooth (the sight of Nanny Ogg eating a pickled onion is described as bringing tears to the eyes). When she is drunk, she has a tendency to sing very "special" songs, the most popular being "The Hedgehog Can Never Be Buggered At All" or simply "The Hedgehog Song" (never really unveiled by the author beyond a few lines, but many readers have written their own versions). A close runner up for the most popular Nanny Ogg song is "A Wizard's Staff has a Knob on the End", a version of which has been written by Heather Wood, with music by Dave Greenslade. It is also notable that Nanny Ogg once gave Agnes Nitt lessons on how to sing, including how sing in harmony with herself (using her alter ego, Perdita).