Delve into the world of simple machines with this illustrated hardcover book by Gene Darby. Published in 1961 by Benefic Press, this book is perfect for children interested in science. With a focus on the topic of children's science, readers will learn all about the various simple machines in a fun and engaging way. This ex-library book includes all the features necessary to make learning an enjoyable experience. The book title, "What Is A Simple Machine," is supplemented by the author's name, Gene Darby, and the publication year, 1961. The book is written in English and is part of the Books & Magazines and Books categories. Don't miss out on the chance to expand your knowledge and discover the wonders of simple machines. Good condition ex-library book with spine sticker and library stamp on title page and on front pastedown (marked out), library pocket on back endpaper. No other writing inside the book. Minor marks/stains on cover, toned pages, bumped corners. Binding is tight and all pages are intact.