Custom 3D Advent Calendar STL

I'm looking for a customizable 3D print STL file for a large themed advent calendar (over 20 cm). The calendar should have 25 compartments and can be designed in a modern or traditional style, but I prefer a themed design, like Christmas or Winter Wonderland.

Key Requirements:
- 3D model should be suitable for printing
- Large size (over 20 cm)
- 25 compartments
- Themed design (e.g., Christmas, Winter Wonderland)
- Ability to customize the design

Ideal skills and experience:
- Proficiency in 3D modeling software (e.g., Blender, Tinkercad)
- Experience in designing 3D printable objects
- Strong design skills for themed concepts
- Familiarity with the requirements for 3D printing

Please include examples of previous work.