Nice find! I didn't even know puffs were out this late. I'd have been scouring my dad's place had I known. I've found dried out puff balls in reliable spots in the past. Although, I never knew what they were back then. I'd give them a good kick and send the spores flying.
I've been contemplating a canon ball run home in the near future, maybe I'll get that done yet.
There are many down in SE WI right now too. Wood blewits,shaggy manes, and the oysters are everywhere on boxelder trees. We found a huge patch of the pear shaped puffballs last week. I like them better than the giants.