I claim the ornamental design for the child's garment, as shown and described.
FIG. 1 is a front isometric view of the child's garment of the present invention.
FIG. 2 is a front plan view thereof.
FIG. 3 is a rear plan view thereof.
FIG. 4 is a side plan view thereof.
FIG. 5 is a side plan view thereof.
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
In the drawings, the evenly broken lines represent stitching on the child's garment and form part of the claimed design while dash-dash-dot broken lines are directed to environmental subject matter only and form no part of the claimed design.