My Big Girl Bed is part of Ladybird's best-selling Pirate Pete and Princess Polly soundbook series for toddlers and young children, starring the ever-popular Princess Polly!Princess Polly: My Big Girl Bed describes the excitement of moving from a cot to a big bed and all the stages along the way, such as choosing bedding, getting rid of the cot and finally Princess Polly discovering what it's like to sleep all night in a big bed of her own. The simple text and colourful illustrations will help little ones understand more about sleeping in a big bed; even why it may at first seem a bit daunting, but how in the end moving to a big bed is an important stage of growing up. Pressing the cheer sound button on every page is also a fun way to motivate your child and involve them in the story!