5 books · Ages 5–9 · Chapter Books
Word Fun is a 5-book series for ages 5–9 by Michael Dahl. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, They're Up to Something in There: Understanding There, Their, and They're and If You Were an Adjective are great first picks.
No particular order needed — browse and pick what catches your eye.