PS This is first and foremost a set of well-designed three-dimensional forms that can exist on their own as décor or souvenirs. They have aesthetic value even before any assembling begins.

Yes, they are used to build other shapes, including a 3×3×3 cube (week six), and this allows for competition — who can find the solution faster or more accurately. However, by its nature this is not a conventional game, but a spatial puzzle: the result depends not on luck, but on thinking, attention, and an understanding of form.
@selina1, @max-pro ..
@isratmim (I was hinting at this in the comments — I think you’ll like it.)