Screws Keep Things Secure: Simple Machines for Kids by Andi Diehn, Imagine building a treehouse, what would you use to keep each board together? Maybe nails, but just maybe you'd use screws. Readers will learn how a screw's shape can pull things together or push things apart or even move heavy objects from one place to another. An introductory poem offers language arts connections while hands-on activity at the end reinforces concepts in the book. A glossary and photos offer additional supplemental learning opportunities. Paperback, 32 pages. Recommended for ages 5 to 8 years old.
