Princess Polly I'm a New Big Sister is part of Ladybird's successful Pirate Pete and Princess Polly range — introducing children to key milestones in a fun and reassuring way. This Ladybird sound book describes the excitement and fun of having a new sibling and becoming a big sister. The simple text and colourful illustrations will help little girls understand what happens when a new baby joins the family and how lovely it is to be a big sister. Other titles in the series include Pirate Pete's Potty, Princess Polly's Potty, Pirate Pete and Princess Polly Please and Thank You.