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Simple Machines (Let's-Read-and-Find-Out Science 2) Paperback – Picture Book, October 6, 2015

4.7 out of 5 stars 155 ratings

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Editorial Reviews

From the Back Cover

Machines are everywhere! They help make work easier, like when you need to lift something heavy or reach way up high. Some machines are so simple that you might not think of them as machines. There are six simple machines: the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw.

Can you adjust a seesaw to lift an elephant? What happens when you combine two or more simple machines? Read and find out!

About the Author

D. J. Ward is a high school science teacher who also writes science books for children. His titles include Exploring Mars, Materials Science, and, in the Let's-Read-and-Find-Out Science series, How a City Works and What Happens to Our Trash? He lives in Castle Rock, Colorado.



Mike Lowery has illustrated numerous children's books, including the Ken Jennings' Junior Genius Guides series and What Can a Crane Pick Up? by Rebecca Kai Dotlich. A professor of illustration at the Savannah College of Art and Design, he lives in Atlanta, Georgia.

Product details

  • ASIN ‏ : ‎ 0062321471
  • Publisher ‏ : ‎ HarperCollins; Illustrated edition (October 6, 2015)
  • Language ‏ : ‎ English
  • Paperback ‏ : ‎ 40 pages
  • ISBN-10 ‏ : ‎ 9780062321473
  • Reading age ‏ : ‎ 4 - 8 years
  • Grade level ‏ : ‎ Preschool - 3
  • Item Weight ‏ : ‎ 5.5 ounces
  • Dimensions ‏ : ‎ 10 x 0.12 x 8 inches
  • Customer Reviews:
    4.7 out of 5 stars 155 ratings

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David J. (D.J.) Ward entered college to study radio and television but quickly found his true passion was science. He finished with a master's degree in geology. After working as a geologist for seven years, David became a high school science teacher and has been teaching ever since. The classes he teaches are physics, astronomy, geology, and earth &amp; environmental science. David lives in Colorado with his wife and two boys. He like to play basketball, volleyball, and Ultimate, hike in the mountains, and play bass guitar.

Customer reviews

4.7 out of 5 stars
4.7 out of 5
155 global ratings

Top reviews from the United States

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Top reviews from other countries

Clare, London
3.0 out of 5 stars ... things were machines (ramps for example) but otherwise a nice read.
Reviewed in the United Kingdom on July 1, 2016
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hetal gupta
5.0 out of 5 stars Simple machine
Reviewed in India on July 9, 2019
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Amazon Customer
5.0 out of 5 stars Great for mini lessons!
Reviewed in Canada on May 11, 2019
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Amazon Customer
4.0 out of 5 stars Good
Reviewed in India on February 11, 2019
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Swathi
5.0 out of 5 stars Great book for preschoolers- primary school kids
Reviewed in India on December 11, 2019
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