2 books · Ages 5–14
Children's Science & Nature is a 2-book series for ages 5–14 by Baby Professor. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, A Simple First Book of Nature and The Platypus Has Hair but Lays Eggs, and Males Produce Venom! are great first picks.
No particular order needed — browse and pick what catches your eye.