a toy building block set suitable for assembling articles of play includes ring like block elements with a circular inner periphery and a polygonal outer periphery with straight side faces . a sixteen - sided polygonal block is provided with square dovetail connector and socket elements arranged on the side faces for connecting the block elements together . other side faces of the block elements are provided with vertical dovetail chutes for co - operation with elongate stacking members having elongate dovetail projections . the block elements are thus able to be arranged in stacks on the stacking members for storage and transportation . lashing points are provided on the stacking member ends for accepting a lashing means to secure the stack positively , and several stacks of block elements can be lashed together for packaging large sets of blocks . different embodiments are presented . in one embodiment the block elements are provided with snap - fit socket elements .