Abstract: A gravity powered timing device is described which is of generally rectangular cross-section, the perimeter portions of which include a plurality of inclined track sections which successively communicate with each other to define a descending track of predetermined finite length. A free rolling ball is adapted to travel downwardly along such track and, at the terminal portion of each track section, is prevented from achieving undesired high speed by collision with the wall portion for the next successive track section. The terminal portion of the lowermost of said inclined track sections is in overlying relationship with a sounding plate, whereby a ball travelling successfully downwardly along the track will be discharged onto the sounding plate and thereby produce an audible signal. If desired, a similar sounding plate can be provided at the upper end of the device, thereby enabling a repeat of the timing cycle to be accomplished by simply inverting the device.