This well known and marvelous Brain teaser puzzle contains 7 nonidentical wooden pieces and a box.
Was invented by a Danish mathematician, Piet Hein in 1936.
There are 240 different ways JUST to build a solid CUBE with those 7 pieces.
Arches , walls , plinths, towers, ships, etc. can also be created from the Soma pieces.
Soma Cube addicts claim that after gaining some familiarity with the pieces, they speed up their solving enormously.
Playing with a Soma Cube provides an excellent way of nurturing someone's grasp of spatial relationships.