My wife teaches math, and one of the tools she uses is the game of Set. However, our copy fell and the ABS box broke, but the lid survived. I designed a replacement box to interface with the original lid. I don’t know how consistent the game has been over time, so I don’t know whether this would work for others.
My replacement is made with FreeCAD LinkStage3 with the save-to-directory feature. The SetBox.FCstd file may work with upstream FreeCAD but the SetBox directory is the canonical location. I printed it in PETG because it should be tough enough if the set gets dropped again.