Abstract: For a single telephone line having plural telephone answering devices (TADs) connected to it, a system of TADs is disclosed where only one TAD answers the telephone but all other TADs connected to the telephone line are accessible and activated by means of tones transmitted over the telephone line by the caller. The caller is notified by the answering TAD of the available tone codes which are then used to select the desired TAD. When a TAD is selected by means of tones, the first TAD is temporarily disconnected from the telephone line so that message privacy is maintained.

Abstract: A book having two bindings with multiple pages and two covers comprises a single sheet which is folded in an accordion fashion. The bindings are located at the leftmost and rightmost sides of the book while fasteners associated with each binding allow the book to be opened from either side.

Abstract: A low profile rolling book comprising plural sheets, bound along one marginal edge. In the preferred embodiment, the book's front cover includes printed matter depicting the top view of a wheeled vehicle having wheel wells disposed adjacent the parallel opposing top and bottom edges of the book. Respective wheels are rotatably mounted at each of the wheel wells.

Abstract: A free-standing rolling book comprises plural sheets, bound along one marginal edge. In the preferred embodiment, the book cover includes printed matter depicting a wheeled vehicle having wheel wells disposed adjacent the bottom edge of the book. Respective wheels are rotatably cantilever mounted at each of the wheel wells. The dimensions of the sheets and the wheel span of the wheels are selected such that the wheels support the sheets in a free-standing position so as to permit the book to roll without external support. The wheel span should be at least two-sevenths of the distance between the center of gravity of the book and the wheel-supporting surface, and, in the preferred embodiment, is one-seventh of the book's height.

Abstract: A whistle is integrally formed from the pages of a children's book. Apertures are formed in adjacent, interior pages, and the apertures are positioned to overlap to form a resonant cavity. A slot is provided in one of the interior pages to provide an air inlet passage through which air may be blown into the resonant cavity. The cover of the book has an opening which forms an air outlet passage, through which air from the resonant cavity is exhausted. In operation, the pages of the book are pressed tightly together to seal the resonant cavity and prevent air leakage therefrom. To facilitate such sealing, the book includes printed matter indicating the general location in which the child should place his fingers when pressing the pages together.

Abstract: A children's book includes printed matter which cooperates with structural features of the book. The printed matter depicts, e.g. a scene from the driver's seat of a vehicle, including, e.g., as a steering wheel and instrument panel. Openings are formed, adjacent to the edge of the steering wheel, within the area bounded by such wheel, so that a child can place his fingers through those openings and, in effect, grasp the steering wheel. The child, therefore, can imagine himself as guiding the vehicle with the steering wheel as he reads the book.