I don't know if paczki are eaten around the country today or just in our area. Paczki are kind of Polish donuts. Locally they have become popular the days before lent. Even though I'm Polish, I don't have many memories of paczki as a child. I do remember my aunt making them once, they were like a large donut hole with raisins. Not something I found exciting. The ones they sell locally are more like a extra sweet bismarks with a variety of fillings. Unfortunately I really like the modern version.
Krzysiak's House, a Polish restaurant in Bay City, sell thousands of paczki on Shrove Tuesday. They have a polka band playing and local radio and TV stations are there for the festivities.
Our paczki had a much less exciting origin, we bought them at Meijers.
The box we bought had raspberry filling, but there are a variety of fillings, cherry, custard, blueberry, apple, lemon, etc.
Ang lives in the Polish section of Brooklyn. When I talked to her last night, I suggest she buy an authentic paczki today. I doubt they are like the MI version.
P.S. Ang just emailed to say that the lady at the Polish bakery told her that in Poland they celebrate Fat Thursday, not Fat Tuesday. So she missed out on the paczki.
P.S.S. So Jenny is correct in her comment :)