(per box).
Great job 'eR'...  Love that boxing... I've never been a fan of painted timber... though stain, still has the jury out.

Seems like this would have been a perfect pilot for my Shaper, however, with the kerf of the laser could probably have  created 10 puzzles... and I don't think you have that many shades of stain.

Don't be disillusioned about made for kiddies.  The adults in my distribution circles, play with them when the kids go to bed... though with the magnets in mine, their puzzles take pride and place on their fridge... ideal for a quick new solution between beers.
The pictured "tans" are only a sample... feedback has indicated many new diversified solutions... even in such short time.
Looks like I'll have to make a few more production runs. Just ordered another 20 magnetic A4 whiteboard sheets.

Was the box CNC'd, or boring traditional tools?

If your first cut is too short... Take the second cut from the longer end... LBD