QRSTUVWXYZ by Meenakshi Mukerji
Number of units: 90 (10 colors, 9 pieces per color)
Designer: Meenakshi Mukerji
Here. Also, check out Assembly Guide. Instructions also found in the book Ornamental Origami: Exploring 3D Geometric Designs (2008, 154 pages) by Meenakshi Mukerji. To get started with models like these, check out How to Make Intersecting Plane Models.
Individual modules are very simple. To make the assembly snug, I shaved off the outer edges created by the last fold with scissors. Took me between 6 and 8 hours to finish. The overall design is 'ten intersecting stars', one star per color. Each star is in a plane -- notice the star made by light blue paper in the picture.