The First How Things Work Encyclopedia by DK is a beautifully illustrated children's reference book that explores the science and technology behind everyday objects and machines. Published by DK Children in 2019, this 136-page hardcover is part of the bestselling DK First Reference series and is designed for children ages 5 to 9 (Grades K–4), with a Lexile reading level of IG920L.

The book lifts the hood of a car engine, gets inside a TV set, and reveals the power of invisible microwaves, using close-up photographs, cutaway diagrams, and clear illustrations to bring technology to life. Timelines trace the history of major inventions, while curiosity quizzes and "weird-or-what" fact features keep young readers engaged and learning. Topics span magnets, sound waves, aircraft aerodynamics, household appliances, and more, making it an excellent resource for homework support and STEM exploration.