Toy Building Block

FIG. 1 is a front view of a toy building block showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is a perspective view thereof.

FIG. 9 is a perspective view thereof; and,

FIG. 10 is a perspective view thereof.

The broken lines shown in the drawings depict portions of the toy building block that form no part of the claimed design.