Angry Birds Playground: Question & Answer Book: A Who, What, Where, When, Why, and How Adventure (National Geographic Kids)The world becomes a playground in this incredible book of questions and answers featuring Rovio's hugely popular Angry Bird characters. The well loved characters encourage children to ask big questions, think big thoughts, and get the right answers. A fun tastic way to help answer the questions kids ask time and time again, this accessible and educational tool allows readers to analyze and explore their immediate world as they build basic skills, and