PUZZLE buildable and practicable, CHARACTERIZED IN THAT HAS TWO rectangular pieces or quadrangular FLAT (1, 2), substantially equal PRESENTING A CORRESPONDING CELOSIA (3) WINDOW SUBSTANTIALLY SQUARE, surrounded by a STEP PERIPHERAL INTERNAL (7), which pieces (1 , 2) together and articulated by means of hinge (6), AND PRESENTING MEDIA MUTUAL RETENTION (4, 5), SO SE abut locking a plurality of pieces LAMINAR SQUARE (8) CARRIER SIGN A SORT, slidable inside the frame thus formed, WHICH CAN BE OPENED FOR THE PURPOSE OF REPLACING SUCH PARTS (8) carrying signs.
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