A kamishibai (japanese storytelling theatre for kids), with 3 doors style and an insert to keep the whole thing enclosed.

The doors have holes for little magnets (4 in total) to hold onto each other.

I designed mine for my little girl, so I added a floral pattern and a gemstone lock (with a 20 in roman numerals because of the nerd I am).

I am also including plain insert and doors, so you can customize it at leisure or at least do away with the roses.

The size is made to accomodate A5 paper, because an A4 version would be too large for most printers (including mine), but if you can go bigger, I don't see why it could not scale up nicely.

If you scale up you also get the added benefit of more forgiving hinges. I broke two of mine during assembling, so in the stl here I added a little more clearance, I cannot overdo it because there is nothing but friction holding the doors open, especially the upper one.

In any case, since the broken ones are not on the same side, the remaining stubs plus the surviving pin still do the job without having to reprint the frame, so don't panic if it happens to you too.

PS. If there is sufficient interest I am ready to modify the design to use filament bits instead of the printed pins for the hinges, I feel stupid for not thinking about it from the start but if it is just me, I'm ok with the one I already have.