FIG. 1 is a bottom perspective view of a toy-block with rail extension showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a first side elevational view thereof;

FIG. 5 is a second side elevational view thereof;

FIG. 6 is a third side elevational view thereof;

FIG. 7 is a fourth side elevational view thereof; and,

FIG. 8 is a bottom plan view thereof.