[An updated version of this post can be found at: https://inventorsoftomorrow.com/2016/10/26/simple-machines-engineering-for-kids/]

There are several series of books about Simple Machines. I got samples from each series, and will write up here my first impressions of each. These are not meant to be in-depth reviews, just snapshots of my opinions. Of course, what book is best depends on your audience and your setting. I am looking for books to read aloud in group time to children age 2.5 to 7. Many of these books that I don’t rate high might be great for a 5 – 7 year old, but I’m trying to find something to appeal to a very wide range.

In this post, I summarize my impressions of the series, based on the books I read (starred). In the attached spreadsheet, I share my specific ratings for the books I read. Here are the four criteria I ranked them on:

• Pictures: Are they good photos (current, focused, visually appealing) of things that are interesting to kids?
• Words: Would this be a good read-aloud book for a group of 3 – 6 year olds? Easy to understand and interesting to listen to?
• Big Idea: Does it get, and adequately convey the key concepts about this simple machine and how it works? (For my summary of what I think those key concepts are, see my Inventors of Tomorrow posts on each of the types of Simple Machines.)
• Examples: Are there several good examples of the machine that would be interesting to children? (But I don’t want examples of every single way this simple machine can be applied, because sometimes that makes it hard for a young child to remember the big picture.)

Series Name: Amazing Science: Simple Machines. Author: Dahl
Books: Roll, Slope, and Slide*; Scoop, Seesaw, and Raise*; Pull, Lift, and Lower*; Cut, Chop, and Stop; Tires, Spokes, and Sprockets
Review: Engaging pictures and words, though a little high level for us. But I didn’t think the pulley book and inclined plane book did the best job of explaining key concepts.

Series Name: Blastoff Readers: Simple Machines. Author: Manolis
Books: Ramps*; Levers; Pulleys*; Screws; Wedges; Wheels and Axles*
Review: These would be my top choice if I had only 5 – 7 year olds, but they’re a little too long and too sophisticated for my little ones. Brightly colored and engaging pictures. Good diagrams and descriptions of key concepts – very clear. Nice examples

Series Name: Early Reader Science: Simple Machines. Author: Dahl
Books: Ramps and Wedges; Levers; Pulleys; Wheels and Axles*
Review: Pictures OK, but not especially appealing to young ones. Length-wise, it would be OK for circle, but vocabulary a little high level. It gives examples of so many kinds of wheels and axles (steering wheels, gears, sprockets, cranks, cams, etc.) that the basic concept is lost. Does not mention friction.

Series Name: How Toys Work. Author: Smith
Books: Ramps and Wedges*; Levers*; Pulleys*; Screws, Nuts and Bolts*; Wheels and Axles*
Review: I want to love these books. The pictures are great. The language is age appropriate and engaging. There are lots of good examples, all of which are toys and other things that appeal to young children. In some of the books, the big idea is explained well (Pulleys and Screws) But others seem to miss the big idea. (Ramps and Wedges; Wheels and Axles.) I would use these books to engage the younger students, but also want some of the other series to share with the older readers to better explain concept.

Series Name: My World of Science. Author: Randolph
Books: Inclined Planes in my World*; Levers in My World; Pulleys in my World; Wedges in My World*; Wheels and Axles in my World [there doesn’t appear to be a Screws book]
Review: Pictures are fine; words are appropriate level and the book is a good length for circle time, big idea is explained well, and there are lots of examples, but they all tie together in a clear logical way to the same big idea. It ends with asking “can you think of [wedges] you see around you?” Then offers a picture glossary of key words. This is a reliable, useable, but not exciting series.
Note: this series is bilingual English / Spanish. So Wedges in My World is also Cunas en mi mundo. Each page has the text in English first, then Spanish.

Series Name: Simple Machines. Author: Armentrout
Books: Inclined Planes, Levers*, Pulleys*, Screws*, Wedges*, Wheels*
Review: The language level and the length would be fine for 5 – 7 year olds, but too much for our little ones. They also go beyond what we need with our younger age group (level book addresses first, second and third class levers and compound levers.) Pictures are fine, examples are good, but in some books there are so many examples the big idea is lost.

Series Name: Simple Machines. Author: Bodden
Books: Inclined Planes; Levers, Pulleys*, Screws*, Wedges*, Wheels*
Review: They’re pretty books, but photos may be a little artsy for little kids. Words are a little dry. In general concepts are very clear and easy to understand and examples clearly illustrate the ideas. But, I thought the screw book was unclear and jumbled examples together that it wasn’t clear how they related. We used several of these books in our circle times in class, but tried to balance with How Toys Work, which are brighter and more fun.

Series Name: Simple Machines. Author: Tieck
Books: Inclined Planes*, Levers, Pulleys*, Screws*, Wedges, Wheels and Axles
Review: A little long, a little old, and too dry for our purposes. But, I think these are the best descriptions of the big idea. We didn’t read these in circle, but I did have them on the bookshelf for the older kids to check out.

Series Name: Simple Machines to the Rescue. Author: Thales
Books: Inclined Planes to the Rescue*; Levers ttR, Pulleys ttR, Screws ttR*, Wedges ttR, Wheels and Axles ttR
Review: I see these recommended on other people’s sites, but I’m not a fan. The pictures aren’t great, the language is a little advanced. And I just find that they do the weakest job of explaining simple machines concepts. For example, in the screw book, their first example is a lid on a soda bottle, then a spiral staircase, then Archimedes screw, then an olive oil press, and then it talks about things that are held together by screws. Nowhere in there does it really describe what a screw is and what type of work each of these tools has in common.

Series Name: Useful Machines. Author: Oxlade
Books: Ramps and Wedges; Levers; Pulleys; Screws*; Wheels
Review: Good pictures, engaging and easy to understand for 5 – 7 year olds. I have only read the screw book, but I like it a lot. However, I would not use it as the intro to screws. Once kids had a solid grasp of the basics of screws, it does a nice job of giving examples of all the different applications

If you’re teaching about Simple Machines, be sure to check out my Inventors of Tomorrow series… I give examples of lots of hands-on activities you can use with kids 2.5 – 7 to teach these concepts.