Charlie and Aunt Joanne are flying around the downstairs of Oma's house with their LarryBoys and LarryMobiles. Only they are not flying around Oma's house. They are flying around Buttland.
I don't know much about Buttland, only that you do crash often in Buttland. And, according to Charlie, "It is not a gooey place."
Also, "You do not get lost in Buttland."