Here's a nice pen holder to color your sad days at the office.

Before starting you will need some 10mm x2 magnets

The Model is easy to print but has some little difficulties. First of all is the choice to print the mushroom's spots vertical or in contact with the plate. In the print profile I gave you the possibility to choose your preferences by loading two different print plates with the spots. here it is an image to explain the difference.

Vertical Print at 0.2 layer height:

And this is the print in contact with the plate at 0.08 layer height with a little bit of fuzzy skin to hide layers:

I chose to print it vertical, because they looking better for me. Yes, they need supports and more time to print it, but the result is better.

Well, Now is time to print and assembly.

The model can be assembled without glue except for the stars, they need a little bit of glue to make sure the magnets doesn't come off.

And finally, the assembly instruction in this video: