" Bulk Of Ancient Geometry"
Torture for the student that I was... thank you, it's better. Eighteen pieces of oak form an old collection of polyhedra, of which here is a bit of a random selection, not exhaustive: pi/3 X h²(3r-h), cylinder of revolution (pi. r².h), oblique hexagonal, truncated oblique circular, spherical cap, oblique or right pyramid, hexagonal prism, etc... what's cool is that you can arrange them as you like. 
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