Many inventions of the 21st century have changed the way people live their lives. This series highlights these great inventions and prompts students to see how their own lives have been changed because of them. Each book provides a basic look at the technology behind each invention, discusses what people used before the product was invented, and examines the impact of the invention. QR Codes in the book give readers access to book-specific resources to further their learning. Aligned to Common Core Standards and correlated to state standards. Cody Koala is an imprint of Pop!, a division of ABDO.