Lot of 8 - 3rd Grade Leveled Life and Earth Science Scott Foresman Pearson Homeschool Readers - Books very with 12-24 pages. Books are paperback.  Titles:  Measuring the Weather, Mount St. Helens, Earth Movement, It's a World of Time Zones, Rescuing Stranded Whales, Water, Do Animals Have a Sixth Sense and Caring for Your Pet Bird.