Long ago, in a time far, far away, the act of posting letters was so ubiquitous, Playskool made sorting toys shaped like mailboxes for toddlers. The first version, from the 40s and 50s, was green. Later incarnations were a patriotic red, white and blue. Both are far more cool than the plastic shape-sorting cube my daughter played with when she was young.
If I could travel back in time to the early 1950s, I could buy my own postal station sorting toy for just $3.00.