The ornamental design for a yo-yo, as shown and described.
FIG. 1 is a perspective view of the first embodiment of the yo-yo design.
FIG. 2 is the side elevation view of the first embodiment of the yo-yo design.
FIG. 3 is a front elevation view of the first embodiment of the yo-yo design, with the rear elevation view being the same as the front elevation view.
FIG. 4 is a top plan view of the yo-yo design, with the bottom plan view being the same as a top plan view.
FIG. 5 is a perspective view of the second embodiment of the yo-yo design.
FIG. 6 is the side elevation view of the second embodiment of the yo-yo design.
FIG. 7 is a front elevation view of the second embodiment of the yo-yo design.
FIG. 8 is a rear elevation view of the second embodiment of the yo-yo design.
FIG. 9 is a top plan view of the second embodiment of the yo-yo design.
FIG. 10 is a perspective view of the third embodiment of the yo-yo design.
FIG. 11 is the side elevation view of the third embodiment of the yo-yo design; and,
FIG. 12 is a front elevation view of the third embodiment of the yo-yo design, with the rear elevation view and the top and bottom plan views being the same as the front elevation view.