A box that is supposed to imitate a block of minecraft ore - after adding an rgb led inside, glowing bright blue or red - it will become a beautiful imitation of diamond ore, redstone or lapis.
Could be a nice night lamp.

The outer box is designed so that (on a good printer) it can be printed without supports, directly on the table. I recommend printing with some gray filament, and then additionally paint with "marble effect" spray paint - it looks like a stone.
Inserts - 5 pieces, printed with transparent filament, all the same, glued from the inside (a drop of superglue).

The lower part has a place for the power cord, a rocker type miniature switch (photo attached), and a central post on which you can wrap an RGB LED strip (or one color). In my case, the glue on such a tightly wrapped tape did not hold well - I additionally covered them with adhesive tape, it does not bother, because the inserts effectively blur the light.
Inside this post - you can place RGB controler, or small powersupply for leds…