Image transformation puzzles

An image transformation puzzle of the geometric vanish type comprising four elongate elements having respective front faces carrying indicia at longitudinally spaced apart intervals and having respective needs pivotally linked together to form a parallelogram foldable through 80.degree. between two orthogonal positions in each of which the elements are closed together so that he indicia form first and second rows with indicia of the first row being in combinative juxtaposition with indicia of the second row together forming a number of recognizable symbols and located at longitudinally spaced apart intervals, folding to a first closed position bringing individual indicia of the first row into combinative juxtaposition only with respective, individual indicia of the second row to form a number of said recognizable symbols each formed by a combination of only one indicia from each row, folding to the other closed position transposing individual indicia at one end of the first row and individual indicia at an end of the second row opposite the one end from the first row to the second row and from the second rows to the first row, respectively, bringing the transposed indicia, respectively into additional combinative juxtaposition with an adjacent, previously endmost, indicia of the second and first rows into which they have been transposed, respectively, so that the transposed indicia in combinative juxtaposition in the same row combine also with respective indicia of the other row to form the recognizable symbols providing a total number of recognizable symbols less in number by one than in the first position thereby producing the illusion of a vanishing image.