Simple machines (Creative Education)

"A foundational look at levers, explaining how these simple machines work and describing some common examples, such as crowbars, that have been used throughout history"--Provided by publisher.

"A foundational look at screws, explaining how these simple machines work and describing some common examples, such as jar lids, that have been used throughout history"--Provided by publisher.

"A foundational look at wheels and axles, explaining how these simple machines work and describing some common examples, such as doorknobs, that have been used throughout history"--Provided by publisher.