Abstract: A game footbag includes an electronic light source circuit. The electronic light source circuit includes an energy source coupled to a light source and an inertial switch. In one embodiment, the energy source is a battery, and the light source includes a light emitting diode. The inertial switch is activated when the footbag is accelerated, such as, for example, when the footbag is kicked or struck. When activated, the inertial switch causes the light emitting diode to emit light. In another embodiment, a timer may be coupled to the inertial switch and the light emitting diode. When the inertial switch is activated, the timer is triggered, which causes the light emitting diode to emit light for a predetermined time period after the footbag is accelerated. In another embodiment, the electronic light source circuit includes a phototransistor that prevents the light source from emitting light when the footbag is exposed to light.