96 strands are anchored on the outside to a fixed frame and on the inside to a spinning ball.  Although the ball spins continuously in one direction the strands never become tangled.  The strands return to their original configuration when the ball has rotated 720 degrees.
<a href="//commons.wikimedia.org/wiki/User:JasonHise" title="User:JasonHise">JasonHise</a>
<span class="int-own-work" lang="en">Own work</span>