This is a small 32mm (1.25in), nine-piece puzzle cube that is extremely difficult to solve! Each piece is different, and there's only one combination that works even though it seems like all the pieces could fit together in many ways. I was fiddling with it for 30 minutes and finally had to peek at the solution, and I'm the one who designed it!

All the pieces print at once flat on the print bed. I also divided the pieces into two files so you can also print the cube pieces in two colors.

Here's the Tinkercad file of the assembled puzzle cube. Use it as a solution! https://tinkercad.com/things/7t3bIbCzG2B