Number of units: 12

Instructions: Sonobe units by Dave Mitchell: Part I and Part II. To assemble the units, Instructions for Assembly with Sonobe units (PDF) — this is a free chapter from Meenakshi Mukerji's book: Marvelous Modular Origami (2007, 92 pages). To assemble many more models using Sonobe units, check out this article.

YouTube Instructions: