My book blogger friend Nancy posted several train ads from the 1940's on Facebook, and I noticed this one was actually from the year of that trip.
My aunt got permission to take me out of school (second grade) for a week or two to take me along with her. I remember the rocking of the train nauseated me, like I was seasick. Then the sand whipped my little bare legs when we walked on the beach because we got there near the tail-end of a hurricane.
All in all, I was not very impressed with Florida! Bonnie was my mother's sister, and my dad's sister Lillian and her family moved from Louisville, Kentucky, to southern Florida a few years later. So I did visit Florida several times as I was growing up, but our family trips were always by car.