To assemble a 30-unit kusudama (typically an icosahedron), you  connect the individual, pre-folded modular units by inserting a tab from one unit into a pocket of another unit . The structure is built around points where five units meet, forming a pentagonal shape, and triangular pyramids.  Preparation Fold 30 identical units:  Most 30-unit kusudama models use the Sonobe unit or a variation of it. Ensure each unit has a "tab" (or flap) and a "pocket" (or slit) for interlocking. Crease well:...