I claim the ornamental design for an inflatable play ring, as shown and described.
FIG. 1 is a perspective view of an inflatable play ring;
FIG. 2 is a right side elevation view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom thereof;
FIG. 8 is a perspective view for the inflatable play ring, showing its use as an inflatable swimming pool; and,
FIG. 9 is a perspective view of the inflatable play ring, showing its use as a Ball Jumping Pit.
The children, swimming pool water and collection of balls are shown for environmental purposes in dashed lines, and form no part of the claimed design.