They are really pretty good. It doesn't take too many to get enough, but my grandmother made them, and a lot of other people back then. Folks didn't waste much in those days. I was a boy growing up in the late thirties and the forties. Somehow I got to be thirteen in 1950 and had those golden teens in the midsouth listening to Elvis and all the other country and R&B greats of that period. Of course, all the while I was eating watermelon.
My parents made them too when we were kids. Some here still do. It was good.
I love neat old guys like you. I grew up much later, but still have the same memories of eating good watermelon.