2 books · Ages 2–7 · Chapter Books
A Book of Concepts is a 2-book series for ages 2–7 by Roseanne Thong. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Round Is a Tortilla: A Book of Shapes and One Is a Drummer: A Book of Numbers are great first picks.
No particular order needed — browse and pick what catches your eye.