1. The Science Book: Everything You Need to Know About the World and How It Works (Click Link to Check Price on Amazon)
Editor's Rating : 8.7 out of 10

2. The Everything Kids' Science Experiments Book: Boil Ice, Float Water, Measure Gravity-Challenge the World Around You! (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
Used Book in Good Condition

3. National Geographic Little Kids First Big Book of Why (National Geographic Little Kids First Big Books) (Click Link to Check Price on Amazon)
Editor's Rating : 8.7 out of 10

4. National Geographic Kids Brain Games: The Mind-Blowing Science of Your Amazing Brain (Click Link to Check Price on Amazon)
Editor's Rating : 9.1 out of 10
Book of exciting facts about what the brain is and how it worksEncourages an interest in science and human biology

5. National Geographic Readers: Planets (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10