Yo-Yo

The yo-yo is a toy consisting of two equally sized and weighted disks of plastic, wood, or metal, connected with an axle, with a string tied around it. First becoming popular in the 1920s, "yo-yoing" is still enjoyed by children and adults alike.

The yo-yo has been used for many centuries. To use, the player pulls the string through the loop to make a slipknot, puts his/her finger through the slipknot at the end of the string and grasps the yo-yo.