Simple but so much fun!
This spinning disk is a modern version of the button on a string (ask Grandma about this one).  We have been told that this is the oldest toy made by man as a toy, it has no other purpose.  Grab the handles, give it a spin, get the rhythm and watch it spin back and forth.  You won"t believe how relaxing and fun this one is until you've tried it. for 12 and over only