Have you heard of Wumbers? Amy Krouse Rosenthal wrote, and Tom Lichtenheld illustrated, a punny book that will stretch your brain!
I've always liked number patterns and words, but when I thought I wasn't "good" at math in 5th grade, I threw myself into the world of words. Now, I don't think in terms of Numbers vs. Words, and I love to see adults and children nurture a love of both.
Here's a list of counting and other math books! And another extensive list of math-related picture books organized by subject!And here's a list with descriptions of how to use picture books to teach math!