Of course I was very familiar with the Irish flag, which I illustrated on the inside of the card, along with my good wishes. During their visit, my grandparents nicknamed me "you know what" as I was constantly telling them things, preceding my revelations with this question phrase. I think now that I must have been driving them crazy, but they never showed any annoyance with me or discouraged my attention.
I didn't get to see them the next year, but they came for a holiday the following year, and perhaps both of them again one more time. I saw my grandmother again three more times after my grandfather's death, but through the years we wrote to each other often. I still think it is interesting that as a child I saw the creative use of a sliding puzzle (I think it came in a gum machine as a prize). I removed all the numbers and used the base as a frame for my mini-painting on the front of the card.