Abstract: A radiator additive which can significantly improve automobile fuel efficiency by adding only slightly to a coolant of a radiator is newly provided. The radiator additive according to the present invention is a radiator additive including a colloidal solution that includes platinum nanoparticles and/or gold nanoparticles having an average particle diameter of 1 to 10 nm, and can improve fuel efficiency of an internal combustion engine by adding to the coolant so as to constitute at least 1% of the volume of the coolant added into the radiator for cooling the internal combustion engine.

Abstract: A radiator additive which can significantly improve automobile fuel efficiency by adding only slightly to a coolant of a radiator is newly provided. The radiator additive according to the present invention is a radiator additive including a colloidal solution that includes platinum nanoparticles and/or gold nanoparticles having an average particle diameter of 1 to 10 nm, and can improve fuel efficiency of an internal combustion engine by adding to the coolant so as to constitute at least 1% of the volume of the coolant added into the radiator for cooling the internal combustion engine.

Abstract: A jigsaw puzzle is disclosed comprising a plurality of interlocking puzzle pieces to complete a design on the surface of the puzzle pieces. Each of the plurality of interlocking puzzle pieces comprising a base member, a luminous sheet containing a luminous material provided on the base member, and a design layer having a portion of a design provided on the surface of the luminous sheet so that a design is formed on the surface of the plurality of puzzle pieces when each of the plurality of puzzle pieces is inlaid at a predetermined position.

Abstract: A baseball game amusement device which is provided with a mechanism for propelling balls within a casing toward target zones labeled to correspond to the various functions that are performed during the playing of baseball, including "ball", "strike", "out", "hit", "two base hit", "three base hit", and "home run"; a baseball diamond having first, second and third bases provided with openings; designators associated with each of the bases, each including a cup-like retention member for holding one of the balls and provided with indicia designating a player, the designators being normally positioned such that the indicia cannot be seen through the openings and being mounted for rotation such that when a ball is received within the retention member, the designator moves to position the indicia of the player within the opening to be viewed by the user of the amusement device; a scoreboard provided with a visual display indicating the number of runs that have been scored; passageways connecting the various target z