Building Block

FIG. 1 is an upper front right perspective view of a building block, showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in FIGS. 1 - 7 are for the purpose of illustrating environmental structure and form no part of the claimed design.