Abstract: A device adapted to be removably placed over a computer keyboard which converts the keyboard to the format of a muscial instrument. The computer is programmed such that selected computer keys of the keyboard will synthesize different musical sounds. The device includes a housing and a plurality of first keys and second keys which are pivotally mounted to the housing. The first and second keys are arranged in a row and are accessible through a cutout in the housing. The first and second keys are shaped to simulate piano or organ keys (white and black). The first and second keys are positioned to register with the selected computer keys. Depressing the first and second keys respectfully depresses corresponding computer keys such that playing of a piano or organ is simulated. The device can also employ a second row of keys.

Abstract: A laser beam pointing system, adapted for use in an aircraft. A preferred embodiment of the system includes: a laser beam source, within the aircraft, emitting a laser beam; and, a plurality of laser beam pointing devices in optical alignment with the laser beam. Each pointing device includes: a cylindrical shaped rotatable housing with a window, and either one or two rotatable optical means in optical alignment with the laser beam. One preferred arrangement is the mounting of one pointing device on the upper external surface of the aircraft fuselage, and of another pointing device on the lower external surface of the aircraft fuselage in a location oppositely disposed to and below the other pointing device, with the two pointing devices being in parallel relationship to each other, and with the pointing devices mounted flush with the aerodynamically configurated external surfaces of the fuselage.

Abstract: A mobile educational toy which simulates a train has a plurality of toy units which are coupled together to form a train. The toy units each include a mobile carriage structure and a graphic block. The graphic blocks are shaped in the form of an alphabet letter, number, or other symbol. By arranging the toy units in a specified order, words or other relationships can be formed by the user. In addition, by virtue of the coupling together of the toy units, a toy simulating a train is formed.