Leselauscher Wissen - these are non-fiction books for children aged 7 and up that can be read and listened to simultaneously. Each book comes with an audiobook, where the text is read clearly and emphatically, specifically designed for beginner readers. With great photos, plenty of additional information, and interactive ideas. What languages exist in the world? What can we express with our bodies? And how do blind people read? Ava would love to speak all the languages of the world to be able to converse with everyone. But what exactly is language? Ava explains this to young readers on her journey through the world of communication. Media such as radio, television, letters, and books are also very interesting. In the book, children learn how radio waves work, when the first email was sent, who developed the printing press, and where the largest library in the world is located.