See if you can fit the pieces into the snowflake shape (without cheating!).
There are also many other shapes that can be made with these pieces, including a straightforward hexagon - I'd love to see what you can come up with!

Was having so much fun learning BlocksCAD that I wanted to try something else.
As usual, I'm not a great coder and I'm sure this could be done more elegantly but it does the job for now.
I first created the basic hex shape after I discovered that cylinders with small radii produced 5, 6, 7 sided shapes etc. After that I created modules that would then add another hex shape at different positions around the first one with a loop to add more if needed (e.g. pos_1 with no. x).
Then I set up modules to create the different shaped pieces in the puzzle before finally creating a base with the 'hull' and 'difference' blocks.

Everything printed out fairly quickly on my Anet A8 and fitted together OK as I built in a little tolerance for that. After my first print I needed to make the gap in Piece 10 a little bigger to fit the other pieces in but they should be OK 'as is' now.
There is an easy/hard setting (0/1 in the variable). The easy setting produces puzzle pieces that can only be one way up, the hard setting means that the non-symmetrical ones can be flipped over. I have only provided stl files for the 'hard' setting, I think the 'easy' ones may need to printed slightly smaller to fit in the base.

Please let me know if you print this out and send me any pictures of fun or unusual shapes you can make!

Note: I am not the inventor of this puzzle - it is one of the many geometric puzzles designed by Stewart T Coffin