Rattlebacks and Tops

Instructions / Notes:

• The Rattlebacks have a smooth ellipsoidal shape. Because of this, they have a tendency to spin counter-clockwise, even when pressed directly downward or spun in a clockwise direction. See the video below.
• This demo also includes variations of tops and yo-yos.
• For example, the tippy tops do not tip over when pushed, but they can flip upside down when spun.

Photo and video of the demo used at the University of Texas at Austin

Last updated on March 29, 2023