Just make sure to punch the pieces out carefully, because there aren't extras for some of the pieces. So, I think this is a good project or gift for any meticulous and patient person. I guess I don't have the patience to keep sanding the pieces down and slowly twisting them in. A few of the little skinny sticks snapped, and although it could still be put together, you could see the mistakes in the final product.

However, it really bothered me when some of the pieces were really hard to press in. The laser cut pieces are very clear cut, and the finished product looks good. The set comes with a few boards of the laser-cut wood pieces that you have to punch out, some little wooden sticks that you have to cut and shorten, some wax, 2 rubber bands, and a tiny little sanding paper. This puzzle took me around 4 hours, and a lot of the time was trying to press the pieces together, because they are a pretty exact (tight) fit. I thought it was fun, but too easy, so I bought this puzzle. A few weeks ago I purchased a Kiwicrate that included a lock and key box building set.

Open source 3d slotted puzzle