Download the Teacher's Guide

Author Mary Wissinger was born in Wisconsin where she spent most of her childhood singing, reading, and daydreaming. She dove into storytelling through acting, singing, and writing (and writing and writing!). A former teacher, she can now be found at her standing desk in St. Louis, MO, writing stories that inspire curiosity about the world and connection with others. She is the author of the entire Science Wide Open Series: Women in Biology, Women in Chemistry, and Women in Physics. To learn more about Mary, you can check out her website, MaryWissinger.com.

Harriet Kim Anh Rodis began illustrating books at the age of seventeen and has been a part of several publications since. She dedicates her career to her dad, who has supported her and her love of books, and who has encouraged her to pursue illustration. She lives in the Philippines.

"'What's that made of?' is such a simple question, but finding the answer can lead to a lifetime of scientific exploration. This book is a first step in that journey!"

—Adam E. Cohen, Ph.D., Professor, Chemistry and Physics, Harvard University

“This series is fantastic! It provides a simple, yet elegant way of introducing young children to subatomic particles at an early level, with incredibly straightforward explanations. A head-start for future chemistry students everywhere!"

—Jen Lee, M.S., Senior Adjunct Professor of Chemistry, Atlantic Cape Community College, NJ

"A great way to introduce atoms and chemical elements to young children, who will be amazed that these tiny units make everything around us! "

—Momin Uddin, Environmental Scientist, Expedited Environmental