This document provides instructions for making a fabric bookmark with an "x marks the spot" design using embroidery floss, cardboard, calico fabric, scissors, glue, and magnetic tape. The instructions include cutting cardboard templates in the shape of squares and triangles, gluing magnets to the triangles, stitching an "x" pattern on folded fabric, and enclosing the triangles between fabric layers using running stitches and a blanket stitch to form a cuff. When completed, the bookmark features magnetic triangles hidden inside folds of fabric with an "x" marking the spot.