It took me about three hours to saw and three hours to glue all the pieces. Putting them together isn't that easy even with the layer prints provided by the computer.

With basic boxes of size 0.5cm x 1.5cm x 2.1cm you can get a cube with an edge length of 10.5cm. Three congruent parts of this cube are show. They can also be used for other constructions.

This is another construction with three congruent parts. Seven congruent figures can be found here.