Cubes Puzzle

This is a simple design, but a tricky puzzle to solve, that is geared towards learning how to 3D design using CAD software. Follow the link below to my website to start designing your own or just watch the video posted here. The overall size is a 2.25 cube when all the pieces are assembled. I designed this using the free CAD software OnShape.

https://www.makerlessons.com/home/the-academy/onshape/3d-print-projects/cubes-puzzle

I posted the files but I am not seeing them so here is the printables link just in case
https://www.printables.com/model/168976-cubes-puzzle