My Big Boy Bed is part of Ladybird's best-selling Pirate Pete and Princess Polly sound book series for toddlers and young children, starring the ever-popular Pirate Pete! Pirate Pete: My Big Boy Bed describes the excitement of moving from a cot to a new big bed and all the stages that every child will go through along the way, such as choosing new bedding, getting rid of the cot and finally Pirate Pete discovering what it's like to sleep all night in a big bed of his own.