Abstract: A shuttlecock for hitting or kicking by a hand, foot or racket comprising a hollow elastic body, a head connected with the body and a tail connected with the head. The body can shrink to press the air in its hollow interior through a curved through hole in the head to give out a whistling sound when this shuttlecock is hit or kicked.

Abstract: A pencil box which can be converted into a desk lamp, including a box seat, a box cover and a pivot member connecting the box cover to the box seat, the box seat having two battery containers and the box cover having two lamp sockets connected to the battery containers via a set of wires which are disposed on the box seat and through the pivot member to form a circuit, a switch being further disposed on the box cover to control the circuit, whereby when batteries and lamps are installed respectively in the battery containers and lamp sockets, the lamps can be lighted up via the switch with the box cover pivoted upward to convert the pencil box into a desk lamp.

Abstract: A lipstick cap with lamp devices, including a cap sleeve used to receive common lipstick seat, and a rotary switch rotarily engaged with the cap sleeve, wherein the cap sleeve is equipped with several lamp devices and a pair of conducting plates electrically connect the lamp devices in series, and the rotary switch has a battery container including an anode and cathode conducting plates which can be selectively electrically connected with the conducting plates of the lipstick cap by means of rotating the rotary switch thereabout whereby when a battery is disposed in the battery container, the lamp devices can be alternatively lighted up in case of applying the lipstick in a dimly lighted place.

Abstract: A multipurpose calculator includes a casing having one pair of side slots made at the front on both side walls for pivotally movable connection thereto of a movable cassette block, said movable cassette block being applicable to move within 180.degree., four elongated holes made on the front end wall through the body of the casing for setting therein of a scraper, a fluorescent marker, a flat type screw driver, and a cross type screw driver respectively. The movable cassette block comprises an illuminating apparatus to provide a solar power calculator with sufficient energy for operation. The said casing includes a rectangular recess for setting thereon of a solar calculator, a cutter and a steel tape respectively mounted on both sides for specific application. According to above-described arrangement, a calculator is practical for multipurpose application.