Construction kit educational aid and toy

A construction kit comprising several planar sheets of regular polygonal shape each having respective top and bottom surfaces, each of said sheets having straight peripheral edges of equal length and each of said edges having an elongated strip of a first type of fastening material wrapped around such edge and extending along such edge and along marginal portions of the top and bottom surfaces of its sheet from one end of such edge to approximately the center of such edge, each of said edges further having an elongated strip of a second type of fastening material, different from said first type, wrapped around such edge and extending along such edge and along marginal portions of the top and bottom surfaces of its sheet from the other end of such edge to approximately the center of the edge so that all of said sheet edges are alike, said first and second types of fastening material being complementally adherent so as to be manually connectible by engagement with each other and being manually separable and reusable for reconnection, but said strips fo said first type of fastening material are not adherent to each other and said strips of said second type of fastening material are not adherent to each other, said strips of first and second types of fastening material alternating around the periphery of each of said planar sheets such that separate sheets are manually connectible by placing edges of said sheets in engagement with first type of fastening material strips contacting second type of fastening material strips but without requiring precisely coplanar orientation of adjacent sheets nor edges of adjacent connected sheets to be precisely registered for a secure but manually disconnectible fastening of said separate sheets.