Hula hoop with sound output

Abstract From the Canadian patent

A hula hoop includes a hoop body inside which a control circuit is arranged. The control circuit has a processor having the functions of turns counting and timing so that the number of rotation turns of the hula hoop and the time period of playing the hula hoop may be calculated and stored in a memory. Output devices, including visual display and audio sound generator, are provided to display the counting and timing result from the processor. Switches or keys axe also provided for the hula hoop player to select the desired mode of operation and to key in the player's body information, based upon which the processor may calculate the calories consumed in playing the hula hoop. Music playing …