Patent ID: 7438623

Claim:
A geometric construction system comprising: a plurality of flat panels of polygonal shape, each of said flat panels having side edges; and a plurality of connecting units provided on said side edges, respectively, so as to permit edgewise interengagement between adjacent ones of said flat panels; wherein at least one of said connecting units includes first and second engaging parts, said first engaging part being formed with a protrusion, said second engaging part being formed with a recess such that said protrusion of said first engaging part on one of said flat panels is releasably engageable with said recess of said second engaging part on another of said flat panels so as to permit edgewise interengagement between adjacent ones of said flat panels and rotation of said flat panels thus engaged relative to each other about an axis; and wherein said second engaging part is further formed with resilient claws that project from and that are angularly displaced around a periphery of said recess, two adjacent ones of said claws of said second engaging part cooperatively defining a gap therebetween, said claws of said second engaging part on one of said flat panels clamping resiliently said protrusion of said first engaging part on another of said flat panels when said protrusion is moved through said gap and into said recess of said second engaging part on said one of said flat panels.