A construction toy set containing a plurality of interlocking pieces, wherein each of said interlocking pieces contains at least one linkage construct and each linkage construct includes: a pivot hub having a first surface and an opposite second surface , wherein said first surface and said second surface are parallel; detents formed in both said first surface and said second surface of said pivot hub , wherein said detents are arranged in a radial pattern; a first yoke arm coupled to said pivot hub , wherein said first yoke arm has a first interior surface and a first exterior surface , wherein said first interior surface and said first exterior surface are arranged perpendicular to said first surface of said pivot hub ; a first protrusion extending from said first interior surface of said first yoke arm , wherein said first protrusion is sized to be received by one of said detents ; a second yoke arm coupled to said pivot hub , wherein said second yoke arm has a second interior surface and a second exterior surface , wherein said second interior surface and said second exterior surface are arranged perpendicular to said first surface of said pivot hub ; and a first gap space separating said first interior surface of said first yoke arm from said second interior surface of said second yoke arm , wherein said first protrusion extends into said first gap space , and wherein said first gap space is sized to receive and retain said pivot hub , wherein some of said plurality of interlocking pieces contain a first linkage construct and a second linkage construct joined together into a single piece, and characterised in that a second gap space is disposed between an exterior surface of a yoke arm of said first linkage construct and an exterior surface of a yoke arm of said second linkage construct , wherein said second gap space is sized to receive and retain said pivot hub . a pivot hub having a first surface and an opposite second surface , wherein said first surface and said second surface are parallel; detents formed in both said first surface and said second surface of said pivot hub , wherein said detents are arranged in a radial pattern; a first yoke arm coupled to said pivot hub , wherein said first yoke arm has a first interior surface and a first exterior surface , wherein said first interior surface and said first exterior surface are arranged perpendicular to said first surface of said pivot hub ; a first protrusion extending from said first interior surface of said first yoke arm , wherein said first protrusion is sized to be received by one of said detents ; a second yoke arm coupled to said pivot hub , wherein said second yoke arm has a second interior surface and a second exterior surface , wherein said second interior surface and said second exterior surface are arranged perpendicular to said first surface of said pivot hub ; and a first gap space separating said first interior surface of said first yoke arm from said second interior surface of said second yoke arm , wherein said first protrusion extends into said first gap space , and wherein said first gap space is sized to receive and retain said pivot hub , wherein some of said plurality of interlocking pieces contain a first linkage construct and a second linkage construct joined together into a single piece, and characterised in that a second gap space is disposed between an exterior surface of a yoke arm of said first linkage construct and an exterior surface of a yoke arm of said second linkage construct , wherein said second gap space is sized to receive and retain said pivot hub . <EOS>