Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.1
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3593
Points per Word
0.000278
Page Count
32
Points per Page
0.03125
Description
Scientists used to think that only humans used tools. Now we know that many other animals use tools, too. Some just use sticks and stones they find lying around. Other animals make their own tools.