What Is the Most Important Invention?

by Tony Stead

We depend on inventions to live in the 21st century, such as washing machines and smoke detectors, but which one is the most important invention? This fourth grade class looks at nine inventions and argues why each is the most important. Read this book to help you decide: What is the most important invention?

• Format: Paperback
• Language: English
• ISBN: 1625218893
• ISBN13: 9781625218896
• Release Date: July 2014
• Publisher: Capstone Classroom
• Length: 24 Pages
• Weight: 0.15 lbs.
• Dimensions: 0.2" x 7.5" x 8.9"