This originally started as something completely different but one thing led to another and I made this cube. It may turn out to be a little more complicated than it seems since all the angles at play and figuring out what slots into where. But then again, you may be able to assemble it first try with each piece. Why don't you try and find out?

The larger two inner pieces use some bulky tree supports to deal with all the wacky internal geometry, have some patience in removing them, it shouldn't be too bad.

First 4 plates are the individual parts if you want them different colors.

Plate 5 is everything together, parts are too tall to print individually in different colors all at once.

I may make more complicated version of this based on some of the things I learned with this one.