This excellent addition to the ever popular Questions & Answers series lifts the flap on all kinds of gadgets, systems and ideas. It answers questions such as How does electricity get into our walls? Why do waves go up and down? and Where does money come from? Perfect for every inquisitive child.

This is Book 18 in the Questions and Answers Series. See all Questions and Answers books here.
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Katie Daynes Biography
Katie has been writing children's books for almost half her life. She specialises in non-fiction books and loves questioning the world from a child's point of view. Over the years she's developed some of Usborne bestselling series, including the See Inside books and