This is a small children’s book, most likely written in the 60’s. It was a small, orange book. It is out of print, possibly in the late 80s, since at one time I somehow was able to research it.
The story follows around a little girl, with a ponytail or pigtails who wears an animal swim tube around her. She is found in the pictures behind others or in groups, and stands out, due to her wearing this tube. Though I don’t remember, I’m guessing the story would have taken place in summer.
I’m sorry I remember so little about this book. My mom and I both remember reading it countless times in the library when I was young (probably early to mid 70’s)