Advent Calender Laser Cut Card Boxes

I've created this advent calendar with a basic idea to have a healthier alternative to sweets and chocolate. The paper boxes are big enough (5x5x8 cm) to put something different in it like fruits, nuts, small toys and puzzles, tea-bags, etc.

Thingiverse is full of inspirations and this one is laser cut out of 3mm MDF and different colors thin cardboard (or is it thick paper?). The kerf is already set to 0,1mm. I've decided to leave out the two "roof" plates because I didn't have enough time t