This is a pen holder that I made for my wife. She requested a particular "3D-puzzle" style pen-holder that she could assemble by herself. 

It is very easy to assemble; start simply by adding the bottom piece to a rib and then add the subsequent frames. After all frames and bottom has been added to a rib - keep adding ribs. The pieces should snap easily into each other. 

You will need to print:

• 1 bottom part
• 7 frames
• 15 ribs

I have included a step of the full model, but that is not made for printing. 

Print with no supports, 0.2 layer height, 15-20% infill for PLA.