A ball toy has an inner spherical shell within an outer spherical shell, a light source being mounted within the inner shell adjacent to a first end of a plurality of etched optical fibers having the other ends arrayed between the inner and outer shells. The outer shell is translucent while the inner shell has a coated outer surface that reflects light from the optical fibers. Between the light source and the first end of the optical fibers is a color chamber having different color elements through which light may be transmitted and which may move when the ball moves so as to vary the colors received by the optical fibers thereby effecting variation in the color seen as the ball rolls or is otherwise moved, the light seen at the translucent shell fluctuating according to the colors transmitted. A motion switch and/or a master switch may be used to turn the system on and off. A timer may deactivate the circuits if the ball is not moved after a period of time.