The ornamental design for a child's safety harness, as shown and described.
FIG. 1 is a front view of a child's safety harness showing my new design in an opened and unfastened condition;
FIG. 2 is a rear view of the child's safety harness of FIG. 1 in an opened and unfastened condition; and,
FIG. 3 is a front elevational view of the child's safety harness of FIGS. 1 and 2 in a folded and fastened condition of use.
The broken lines in the drawings disclose stitching that forms part of the claimed design.
The front panel of the harness includes the label “BambinO 7”, a registered trademark of Carren Rieger. The owner of the trademark used in the claimed design has no objection to the use the Trademark.