Every time I take a walk with the boys, we walk by a tree bearing these cool seed pods scattered around it's base.
And as my boys will tell you, every time I can't resist picking one up and carrying it with me the rest of the walk. I then obsessively wonder (out loud, over and over) what kind of tree it is.
It's a sweetgum.
Googled it today and finally solved the tree mystery. That's one less thing I do not know.