-
Invented by English physician named J.A. it was a popular toy that had two different iamges on opposite sides of the circle, twirling the strings creates the illusion of both images combining into one picture.
Want to make a timeline like this?
Use Timetoast to turn dates, events, milestones, and phases into a clear visual timeline you can build and share. Timetoast is a timeline maker for work, school, research, and stories.