

A kit consisting of colored rods and slotted balls that can be used to construct threedimensional configurations. The balls into which the rods are placed resemble an "expanded" small rhombicosidodecahedron, with the squares replaced by rectangles, as illustrated above. The expansion is chosen so that the resulting rectangles are golden rectangles.
For a solid zome unit with edge lengths 1 and (where is the golden ratio), the circumradius is
(1)

the volume is
(2)

and the surface area is
(3)

In the zome kit, the rods come in four colors, and there are three lengths for each color, as summarized in the table below. Here, is the golden ratio.
color  lengths  
blue  
yellow  
red  
green 