FIG. 1 is a perspective view of a front of a first block of a block set for construction of structures showing the claimed design;
FIG. 2 is back perspective view of the first block;
FIG. 3 is a front view of the first block;
FIG. 4 is a back view of the first block;
FIG. 5 is a side view of the first block;
FIG. 6 is a side view of the first block;
FIG. 7 is a top view of the first block;
FIG. 8 is a bottom view of the first block;
FIG. 9 is a perspective view of a front of a second block;
FIG. 10 is back perspective view of the second block;
FIG. 11 is a front view of the second block;
FIG. 12 is a back view of the second block;
FIG. 13 is a side view of the second block;
FIG. 14 is a side view of the second block;
FIG. 15 is a top view of the second block;
FIG. 16 is a bottom view of the second block;
FIG. 17 is a perspective view of a front of a third block;
FIG. 18 is back perspective view of the third block;
FIG. 19 is a front view of the third block;
FIG. 20 is a back view of the third block;
FIG. 21 is a side view of the third block;
FIG. 22 is a side view of the third block;
FIG. 23 is a top view of the third block;
FIG. 24 is a bottom view of the third block;
FIG. 25 is a perspective view of a front of a fourth block;
FIG. 26 is back perspective view of the fourth block;
FIG. 27 is a front view of the fourth block;
FIG. 28 is a back view of the fourth block;
FIG. 29 is a side view of the fourth block;
FIG. 30 is a side view of the fourth block;
FIG. 31 is a top view of the fourth block;
FIG. 32 is a bottom view of the fourth block;
FIG. 33 is a perspective view of a front of a fifth block;
FIG. 34 is back perspective view of the fifth block;
FIG. 35 is a front view of the fifth block;
FIG. 36 is a back view of the fifth block;
FIG. 37 is a side view of the fifth block;
FIG. 38 is a side view of the fifth block;
FIG. 39 is a top view of the fifth block;
FIG. 40 is a bottom view of the fifth block; and,
FIG. 41 is a perspective view of the block set for construction of structures, shown assembled in a structure.