Connection element for making assemblies of toy units

A connection element for connecting together toy units to make assemblies of a plurality of toy units, each provided with holes of substantially equal diameter, said connection element comprising in combination, parts of elastically deformable material having generally cylindrical shape and of a diameter to cause a tight fit when mounted in said holes, a flange of substantially larger diameter than the cylindrical diameter provided between two portions of generally cylindrical shape being arranged coaxially, said flange extending outwardly in directions perpendicular to the common axis of said generally cylindrically shaped portions and adapted to abut and support opposed surfaces of two toy units to be held together by the connection element, each of said two generally cylindrically shaped portions having a reduced outer diameter cylindrical axial section between its end and a spaced distance from the flange adapted to retain mount and bear thereon plate members to freely pivot without interference with adjacent toy units and to mate with apertures in the plate members of thickness less than the reduced outer diameter axial length, said portions and flange defining a continuous hole therethrough coaxial with the cylindrical portions and a slot through the axial length of the portions and flange to provide greater resiliency for positioning in the toy unit holes, said element is further provided with a single axially extending reduced thickness wall part located opposite said slot at each of the two said portions of generally cylindrical shape, but not the flange.