Toy Building Block

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

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in FIGS. 2 & 8 represent boundaries of the claimed design. The areas bound in broken lines and shown in half-tone de-emphasized shading illustrates portions of the toy building block that form no part of the claimed design. Neither the broken lines themselves nor the lightened areas contained within the broken lines form any part of the claimed design.