These are probably my favorite kind of 3-D puzzles and the best part is I can make them myself. They can be any type or size of wood and have any jig saw puzzle like pattern, there is just no way to go wrong. Mine is made out of pine so it will be easy to stain and sand.
All you need is a scroll saw (I used my dad's new Craftman Scroll Saw
to do this and it was so much faster than my off brand scroll saw) and a block of wood.
If this is your first time using a scroll saw then you might like to read step 2, if not then just skip it unless you might want some helpful tips on cutting. I like to sand all of my cubes and stain them so if you dont want to do this just disregard
I will shortly post a picture of my sanded and stained cube.