Swimmer Annette Kellerman, on a ball field, demonstrating the  <a href="https://en.wikipedia.org/wiki/Diabolo" class="extiw" title="en:Diabolo">Diabolo</a>.  In ca. 1907 magazine ads, this was marketed as "Mefisto (the Craze of All Nations)".
Photographer not credited, Bain news service
early 20th century
Cropped version of <a href="//commons.wikimedia.org/wiki/File:KellermanBallfieldMefisto.jpg" class="mw-redirect" title="File:KellermanBallfieldMefisto.jpg">File:KellermanBallfieldMefisto.jpg</a>, derived from TIFF file on the Library of Congress site.