Abstract: A reversible colorful writing apparatus includes a reversible writing board composed of a plurality of coloring picture tubes each filled with a plurality of immiscible coloring liquids in each coloring picture tube and suspended with a miniature magnet within each picture tube, and an inkless writing pen having a stepping-motor control circuit provided within the writing pen; whereby upon moving of the pen on the board, the stepping-motor control circuit will drive the miniature magnet forwardly (or reversely) in each picture tube to drive the immiscible coloring liquids forwardly (or reversely); and upon setting of the magnet at a specific position in the tube, a specific coloring liquid corresponding to such a specific magnet position will be driven to the top surface of the picture tube to display such a specific color on the board.

Abstract: An adhesive tape prewound on a reel includes a plurality of short cutting slits equally-spaced and pre-cut in a side edge portion lengthwise of the tape; whereby upon an initial tearing of the tape from each short cutting slit, the tape will be severed easily, safely and manually without the aid of a cutting knife.

Abstract: A hygienic pad for toilet seat includes: an upper layer made of soft, durable and flexible sheet material of annular shape, and a bottom layer having a plurality of sector members made of materials having suitable coefficient of friction to be frictionally held on a toilet seat and secured to a bottom surface of the upper layer, whereby upon folding of the plurality of sector members of the bottom layer to be concealed in the upper layer, the hygienic pad will be folded, and stored for convenient reuse without contacting a bottom surface of the bottom layer which may be contaminated by dirts in the toilet.