The disclosed didactic-educational toy is comprised of a series of parts or elements which are interconnected and which consist essentially of: a) rectangular plates which may be joined together by means of elongate boards carrying ten dowels distributed in two rows of five; b) thinner plates representing digital numbers from number 'one', consisting of a small plate, up to number 'ten' of maximum surface area, having an equal number of stepped cylindrical protuberances with axial perforation for insertion into the dowel-carrying plates; c) transparent templates having each ten circular orifices; d) assembly parts for assembling the digital plates; e) articulating parts configured like hinges and connected to the lower face of the digital plates; f) reading and writing cards placed on molds as well as other cards carrying words and allegorical drawings.
DIDACTIC-EDUCATIONAL TOY FOR ELEMENTARY ARYTHMETIC OPERATIONS, READING AND WRITING