This is an adjustment to the Mario Box at https://www.thingiverse.com/thing:1819204. On my Anet A8, the question marks and bolts were too large to fit into their recesses on the box, so I used Fusion 360 to inset them by 0.5 mm on each side. I also added a coin slot to the top so the box can double as a piggy bank (glue the cover on!).

Everything is prints great at 0.4 mm layer height.

I recommend scaling the screws to 95% for a better fit.