Scientists and inventors have created all kinds of machines and technologies that help people travel, communicate, and stay healthy. This fascinating series offers young readers an up-close look at eight important inventions. Each book walks readers through the invention's history, the science behind how it works, and how the invention has changed people's lives. Each book also includes a table of contents, one infographic, fun facts, a That’s Amazing special feature, quiz questions, a glossary, additional resources, and an index. This Focus Readers series is at the Beacon level, aligned to reading levels of grades 2-3 and interest levels of grades 3-5.