But I have fun memories of exchanging Valentine's Cards in elementary school (Captain Cook and Kingsford Smith), where we were told to be sure to have a card for each child in the class so no one was overlooked. All the cards were put into a specially decorated Valentine's Box, and were carefully drawn out by the teacher and handed around.
I found among my mother's possessions after she died, a box with cards from myself and my siblings. Here are two of the Valentine's cards from me to her that she saved:
Such Sweet Memories!