The First How Things Work Encyclopedia by DK is a visually rich children's reference book that explores the science and technology behind everyday objects. It lifts the hood of a car engine, gets inside a TV set, discovers the power of invisible microwaves, and examines many other machines and tools that surround us. Close-ups, cutaways, and diagrams bring technology to life, making complex concepts clear and engaging for young readers.

Inside, timelines trace the fascinating development of inventions over time, while curiosity quizzes and surprising facts encourage deeper thinking. The 136-page hardcover is designed to let children truly see and understand what is happening inside the simple tools and mighty machines of the modern world.

Published by DK Children in 2019, this book is part of the DK First Reference series and is recommended for ages 5–9, spanning kindergarten through grade 4, with a Lexile reading level of IG920L. It measures 8.5 x 10.875 inches.