The ornamental design for a spinning golfballtoyassembly, as shown and described.
FIG. 1 is a top, front and side trimetric view of the spinning golf ball assembly showing my new design; and,
FIG. 2 is a bottom plan view of the ball and tee element shown separate from the assembly or clarity.
The broken lines are included for the purpose of illustrating the portions of the spinning golf ball toy assembly and its environment that form no part of the claimed design.