Millie McBean is so excited to meet her baby brother.She can't help but think about all the brilliant things they're going to do together.However, when Rudy arrives he only wants to do one thing - cry!Millie tries EVERYTHING to make Rudy stop crying - toys, books, teddies; nothing will stop him crying.Until, all of a sudden, Millie discovers the perfect thing to make her new little brother happy. WAAAAAA! is a story of the bond between brother and sister and how the simplest solution can often be the key to solving any problem.