I have a granddaughter that will be one this week, too!
I was selling eggs to a doctor awhile back, and got a fart egg one day and a very very large egg the next. They were actually from my duck. I put both the eggs in her box because I thought she would find them interesting, which she did. She always wanted me to tell me which breeds layed which colors, so I knew she liked the interesting difference of having real chicken eggs that are imperfect and individual and how often do you see a fart egg?
But her roommate, apparently, was totally grossed out! She was so appalled by the fart egg and the double yolker, they no longer buy duck eggs at all and only want chicken! I'll have to make sure not to give them any real big eggs in the future as most of my double yolkers were really large eggs (and came from young pullets).
We have usually gotten our worst weather right around this time.