I designed this butterfly box for my daughter.
I have the 3mf colored to resemble a monarch butterfly.
I have also provided the stl files. Feel free to color the butterfly box any way you wish. If you do color it yourself pay attention to the hinge. Parts of it have to be filled in with the appropriate colors. There is 2 images above to show the locations.
You will need 8 - 8×3mm magnets and glue for assembly. You will also have to put some glue on the end of the hinge pin.
When you print the hinge pin make sure it is set to 20mm Strength with the Brim type set to Outer brim only.