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!
Series: Lift-the-Flap Questions and Answers
These delightful books explore all kinds of questions that young children ask. Lift the flaps to discover who, what, when, where, how, which, and why!