2 books · Ages 5–10
Earth Sciences Books is a 2-book series for ages 5–10 by Baby Professor. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Swimming In The Deep! Oceans - Arctic, Atlantic, Indian, Pacific And Southern and Metamorphic, Igneous and Sedimentary Rocks are great first picks.
No particular order needed — browse and pick what catches your eye.