Simple Machines is written for students to follow along and learn that everyday items in our lives such as a zipper and a fork are simple machines. The reader can make their own movable pulley as well as design a new invention. There are instructions for building a helicopter. They are encouraged to use their minds and imagination to figure out levers, inclined planes, wheels and axels, screws, wedges, and pulleys. This would be a great book for Science Fair projects or a beginning engineer resource for the younger grades. There are projects throughout this book as well as a timeline and a glossary in the back. Glossary words are highlighted in red and the student can look for the definition in the back of the book. I would recommend this for any collection looking for information on engineering for the younger grades or a resource for science projects. ( )

$12.95

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