From the first sign language to text messaging, humans have always looked for new ways to communicate with each other. Find out who invented some of our most important communication devices, and learn all about how they work. Then pick your favorite way to tell a friend all about it!
Format:Library Binding
Language:English
ISBN:0836892267
ISBN13:9780836892260
Release Date:July 2008
Publisher:Gareth Stevens Publishing
Length:32 Pages
Weight:0.60 lbs.
Dimensions:0.3" x 7.9" x 10.0"
Age Range:7 to 11 years
Grade Range:Grades 2 to 6
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