The current mushroom is Blue Brat Oyster!
Blue Brats are a variety of Pleurotus ostreatus (aka Oyster Mushrooms). Cultivated worldwide, they're easy to grow, and considered a choice edible. Baby Blue Brat mushrooms start out with a deep blue cap, eventually turning gray as the mushrooms mature.
You can buy a Blue Brat Tabletop Grow Kit through November. Orders will ship the first two weeks of December.
(After Nov 30, any orders placed will be for the next mushroom variety.)