Foldable Stool

FIG. 1 is a top, rear, right-side perspective view of a foldable stool showing my new design; FIG. 2 is a bottom, front, left-side perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a left-side elevational view thereof; FIG. 6 is a right-side elevational view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; FIG. 9 is a top, rear, right-side perspective view of FIG. 1 in a folded configuration; and, FIG. 10 is a bottom, front, left-side perspective view of FIG. 2 in a folded configuration. The broken lines shown in the drawings depict portions of the foldable stool that form no part of the claimed design.