They're called Peziza vesiculosa, aka "dung cup".  :)  They are quite large and VERY interesting.  I was mored excited than the kids.  Yesterday was their first official day of summer break for grief's sake.  They were not in the mood to do anything remotely resembling school.  Oh well, I had fun!

This is the base.

These are the chunky pieces that come off the base.  (I'm rather sure "base" isn't the correct word to use.)

Here are a few other fungi finds.  They were everywhere yesterday!