Polly has a friend, Bunny. He may be an imaginary friend but nonetheless Polly absolutely MUST use the pushchair that was hers as a baby to push Bunny around. So when Polly's parents need the pushchair for a new arrival in the family, they try all sorts of ways to persaude Polly to give it up. But ultimately the situation is unlocked all thanks to Polly's imaginative solution that means everyone is happy!