Abstract: A puzzle device which includes an array of indicators, each of the indicators capable of alternately indicating a first state or a second state, the array being formed into a three-dimensional shape; a mechanism for selecting one of the array of indicators; and a mechanism for changing, upon the selection of one of the array of indicators, the state of at least one of the other of the indicators based on a pre-determined pattern.

Abstract: A puzzle device which includes an array of indicators, each of the indicators capable of alternately indicating a first state or a second state; means for selecting one of the array of indicators; and means for changing, upon the selection of one of the array of indicators, the state of at least one of the other of the indicators based on a pre-determined geometrical pattern.

Abstract: A puzzle device which includes an array of indicators, each of the indicators capable of alternately indicating a first state or a second state; means for selecting one of the array of indicators; and means for changing, upon the selection of one of the array of indicators, the state of at least one of the other of the indicators based on a pre-determined pattern.

Abstract: Apparatus for carrying out an amusement, educational or similar function accompanied by audible sounds relating to an article, comprises a static memory unit adapted to be located at a fixed location with respect to the article and including a read-only memory having digitally stored therein a recording of particular audible sounds relating to the article, and a portable sound-producing unit to be carried by a user for converting a digital recording stored in the read-only memory of the memory unit to audible sounds. The sound-producing unit stored the digital data from the memory unit at a rate faster than the normal speech rate, and plays it back at the normal speech rate. Examples of applications of the apparatus include museum and exhibition displays and geographical directories.

Abstract: A sound-producing amusement device, having: a read-only memory having recorded therein digital data representing sounds characteristic of the amusement device, and sound-producing unit for producing the sounds represented by the digital data recorded in the read-only memory. The read-only memory is in a separate unit including connectors for connection to the sound-producing unit. The sound-producing unit includes mating connectors for removably attaching and electrically connecting the sound-producing unit to the read-only memory unit, a battery for supplying power to both the sound-producing unit and the read-only memory unit, and a speaker for producing the sounds represented by the data stored in the read-only memory unit.

Abstract: A sound-producing amusement or educational device, particularly a book, comprises a read-only memory having recorded therein digital data representing sounds characteristic of the amusement device, and a sound-producing unit for producing the sounds represented by the digital data recorded in the memory. The memory is in a separate unit attached to the book and includes connectors for connection to the sound-producing unit. The sound-producing unit is separate and distinct from the book and its memory unit, and includes mating connectors for removably attaching and electrically connecting the sound-producing unit to the memory unit, a battery for supplying power to both the sound-producing unit and the memory unit, and a speaker for producing the sounds represented by the data stored in the memory unit.