Tammi Van Hollander is an internationally recognized speaker, psychotherapist, author, educator, and founder of Main Line Play Therapy. With more than 30 years of experience, her work brings together neuroscience, attachment, creativity, and play to help children, families, therapists, educators, and organizations build connection, resilience, and new possibilities for growth.

Tammi is a TEDx speaker and has presented and trained professionals throughout the United States and internationally. She is the author of The Bibliotherapy Toolbox and Casey’s Greatness Wings, creator of Greatness Sticks® and Greatness Cards®, and a founding board member of the World Association for Sand Therapy Professionals.

At the heart of Tammi’s work is a belief that every behavior has meaning—and that curiosity, connection, and creativity can open the door to meaningful change.

Explore Tammi’s speaking, training, supervision, retreats, and resources at tammivanhollander.com.