I designed and made this puzzle long time ago. For designing this puzzle I am inspired from “Stars and stripes” puzzle designed by Wolfgang Schneider. Thanks from here for his beautiful and original design.
This puzzle has nine pieces. I like this puzzle, because it looks nice and different. The solution isn’t very difficult but force you to think about assembly. This puzzle isn’t a beginner project, because it’s require a precise work. For my puzzle, cube dimensions are 20x20x20 mm. Planks are 20x10x80 mm. You can cut planks 0.2 or 0.3 mm longer according to your working precision. You will need 20 cube and 18 plank. The center of the puzzle and the center of each face is empty. Puzzle pieces are here,
After preparing your cubes and stripes, assembly also require precision. Before fixing cubes to the planks, you must be sure that a plank can enter between two cube. And the two plank of each piece must be perfectly perpendicular. You can make a simple gluing jig from your scrap woods or you can use a small machinist square. You can make also this puzzle with 3D printing like almost everything. 🙂 You can download or preview free PDF file including solution from here. (0.4 MB on secure server box.com)
DIY Puzzles 
Also you can find the solution of this puzzle here