The 1st book The World of Animals has lots of good information from little protists up to huge mammals. My kids enjoyed the bug section most because they're not as scary when you are learning about them in a book. It's amazing how much God has created. We can't forget about those little organisms.
The 2nd book World of Science is full of fascinating scientific facts. My son is learning about atoms and the Table of Elements and all that good stuff in his virtual science class. I was grateful to have a biblical sound science book to turn to for us to learn more in. These books are really awesome!