Construction toy

Claim 1

A toy construction set useful for the erection of toy buildings of various designs, the toy comprising: a first rigid, planar board having an array of apertures disposed on one planar surface of said board; a plurality of pillars, each of said pillars having a lateral cross-sectional configuration sized to be fitably received into any of said apertures of said array, each of said pillars having at least two longitudinally disposed side grooves therein; a plurality of wall panels connectable within said pillar longitudinal grooves along said panel sides for forming a wall structure of a building; an upper floor panel utilized for forming an additional floor in conjunction with said pillars, said upper floor panel having an aperture disposed therein for receiving a stairwell, said upper floor panel having a plurality of tabs disposed around its perimeter, said tabs being receivable within the longitudinal grooves within said pillars for mounting said upper floor panel in a spaced relationship above said planar surface; a plurality of steps, each of said steps being pie-shaped and including a protruding peg vertically disposed on one side and an aperture on an opposite side aligned with said vertically protruding peg, whereby said steps are mounted together forming a spiral staircase disposable beneath said aperture disposed in said upper floor panel, said spiral staircase being mounted on said planar surface.