This morning I felt motivated to explore the wonders of Piet Hein’s Soma cube. So I did what I usually do — I made a computer graphic version of it.
There is so much more to explore about this fascinating 3D puzzle. Meanwhile, you can see my first experiments with it by clicking on the image below.

Quote I recall attributed to Piet Hein: “Problems worth of attack, prove their worth by hitting back.”
I loved playing with those as a kid. Buy two! You can make all sorts of fun shapes with two sets.