The ornamental design for a portion of a toy, as shown and described.
FIG. 1 is a perspective view of a portion of a toy showing our new design;
and,
FIG. 2 is a top plan view thereof.
The shading of the circular elements within the claimed region indicates
illuminable regions. The broken line showing of the remainder of the toy
is for illustrative purposes only and forms no part of the claimed design.