What is a Tetrahedron?
TectonicToys® Hinge Sets™
One box contains 32 identical modules that are plastic hinges that snap together. With multiples of only one module you can make the five regular solids that are stable and available for in depth study. The Archimedean solids and many of Buckminster Fuller’s Geodesic forms can also be built using this frame system. Tectonic Toys® is the only frame system on the market today that can make this claim.

TectonicToys® Hinge Sets™ are available in 5 different colors chosen to impact the visual understanding of your shape creation.

Order NOW and get one extra set free when you buy four boxes
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Download Building Directions [pdf]
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Four equilateral triangles joined at the edges makes the TETRAHEDRON. Four points arranged on the surface of a sphere to be perfectly equidistant from each other. The inner edges of a TETRA make a tetrahedron.
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