Abstract: A sock with a shoehorn which is generally an elongated elastic tube band. The tube band has a slippery inner wall which is not very thick. The tube band is attached closely to a bottom heel portion of the sock with its two opposite ends fixed on a symmetrical line on both sides of the sock. A wearer holds an open collar or rim of the shoe and inserts their foot into the shoe such that their foot pushes forward and down on the bottom heel portion of the sock, which in turn pushes the tube band against the collar of the sock, where the tube band is rolled against the collar to a location adjacent to a rear heel portion of the sock. The tube band which was under the bottom heel portion of the sock is rolled back to the rear heel portion of the sock and concealed inside the shoe.

Abstract: A switch lock plays a key role to combine a plurality of four embodiments covering Cube, Trigonal Prism, Right Pyramid, and Quadrant Column plus accessary Segment Column blocks through a ring opening lying centrally on every side of these embodiments, except of Segment Column only one surface sharing it. By the sliding between rounded corners and that happening between sphere surfaces, assembly purpose is then achieved. What they really touch is only three small pieces of are and six points; therefore, assemblage and disassemblage among blocks turn much easier. After assemblage, six semi-circular knobs below the ring opening will stable hold the middle lower part of three ball-like projections on the enlarged head of the switch lock in pairs by the strength of expelling each other. In addition, taking the advantage of expelling each other between the rounded corner behind a neck line and that below the head of the switch lock, the blocks can match each other firmly and correspondingly without any rotation.