2 books · Ages 3–6 · Early Readers
I Spy Scholastic Readers is a 2-book series for ages 3–6 by Jean Marzollo. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, I Spy Santa Claus and I Spy Lightning in the Sky are great first picks.
No particular order needed — browse and pick what catches your eye.