FIG. 1 is a perspective view of the set of building blocks of the design;
FIG. 2 is an enlarged-scale perspective view of a first block of the set of building blocks in accordance with the design;
FIG. 3 is an enlarged-scale right side elevational view of the first block;
FIG. 4 is an enlarged-scale left side elevational view of the first block;
FIG. 5 is an enlarged-scale top plan view of the first block;
FIG. 6 is an enlarged-scale bottom plan view of the first block;
FIG. 7 is an enlarged-scale front elevational view of the first block;
FIG. 8 is an enlarged-scale rear elevational view of the first block;
FIG. 9 is an enlarged-scale perspective view of a second block of the design;
FIG. 10 is an enlarged-scale front elevational view of the second block, the rear elevational view being identical;
FIG. 11 is an enlarged-scale right side elevational view of the second block, the left side elevational view being identical;
FIG. 12 is an enlarged-scale top plan view of the second block;
FIG. 13 is an enlarged-scale bottom plan view of the second block;
FIG. 14 is an enlarged-scale perspective view of a third block of the design;
FIG. 15 is an enlarged-scale front elevational view of the third block, the rear elevational view being identical;
FIG. 16 is an enlarged-scale right side elevational view of the third block, the left side elevational view being identical;
FIG. 17 is an enlarged-scale top plan view of the third block; and,
FIG. 18 is an enlarged-scale bottom plan view of the third block.
FIGS. 2-18 are shown separately for ease and clarity of illustration.