  The transition from microscopic to macroscopic in quantum mechanics can be
seen from various points of view. It is often not merely a transition from
quantum to classical mechanics in the sense of the Correspondence Principle.
The fact that real macroscopic objects like baseballs are composites of an
extremely large number of microscopic particles (electrons, protons etc.) is a
complicating factor. Here such composite objects are studied in some detail and
the Copenhagen interpretation is applied to them. A computer game model for a
simplified composite object is used to illustrate some of the issues.
