Soma Cube

Piet Hein's 1933 puzzle: seven pieces made of small cubes that fit together into a 3 × 3 × 3 cube in 240 different ways. A file of the finished cube is included as a hint.

Great for spatial thinking and volume: 27 small cubes in all.

Design by kosteklvp on Printables, shared under CC BY-SA 4.0. The files and photos are the designer's, unchanged.

1. Print each piece in a different colour: 0.2 mm, 10% infill, no supports.
2. Count the small cubes in each piece; check they add up to 27.
3. Build the cube, then other figures (a staircase, a tower), and draw them from three views.