Sadie and Ratz by Sonya Hartnett
Sadie and Ratz are Hannah's hands - and they turn into wild beasts when Baby Boy is around! Sadie and Ratz are the names of Hannah's hands. They aren't animals but they behave like wild beasts, especially when four-year-old Baby Boy is around. They jump on his head and try to rub his ears off. One day Baby Boy decides to get his own back. He draws on the wall. He spills milk on the carpet. He tells Grandma that Sadie and Ratz pushed him. After he pulls off a leg of Hannah's stick insect, Pin, and blames it on Sadie and Ratz, Hannah decides it's time to send Sadie and Ratz off on holiday to prove their innocence.