The ornamental design for a blocktoy, as shown and described.
FIG. 1 is a perspective view illustrating the overall shape of a block toy, showing our new design;
FIG. 2 is a bottom perspective view of the overall shape of the subject design;
FIG. 3 illustrates a front part of the design;
FIG. 4 illustrates a rear part of the design;
FIG. 5 illustrates a left part of the design;
FIG. 6 illustrates a right part of the design;
FIG. 7 illustrates a top part of the design;
FIG. 8 illustrates a bottom part of the design;
FIG. 9 illustrates a state in which the subject design is combined with a spherical block; and,
FIG. 10 illustrates a state in which the subject design is separated from a spherical block.
The broken lines in FIGS. 9 and 10 represent portions of environmental structures in which the design is embodied, that form no part of the claimed design.