Abstract: The present invention is related to a handheld tethered ball device comprising a tether assembly and a ball unit coupled therewith. The tether assembly includes a cord and a handle, which can be coupled to one another by means of a swivel. The cord preferably ends in a terminal loop that attaches to a ball retention cord protruding from the ball unit. An illumination assembly is included in the ball unit to provide various light emitting patterns. The illumination assembly is powered by batteries. Batteries are concealed by a securable battery cover, which is secured by at least one screw. The illumination assembly is attached to an aperture positioned between retention apertures on the ball unit, to which the ball retention cord is coupled.