Spiked Icosahedron (Sonobe variant)
Model
Folding instructions:
Sonobe unit
This is the primary page for this model.
Paper:
copy paper
Type:
modular spiky balls
(implies:
abstract modular, abstract, geometric, mathematical object, modular, multi-sheet, spiky balls)
Author:
Michał Kosmulski, other/uknown
Units used:
Sonobe Unit,
by:
traditional model
(simple variant, designed by myself, and probably also independently by others)
Unit count: 30
Colors:
orange
In albums:
Models designed by me and by others, Modular ② — medium number of units, Sonobe variants

I think this is my first Sonobe variant. Since it’s one of the simplest modifications possible, it has probably been independently discovered by many others.
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