This morning Luke created his own Fortress of Solitude in the corner of the living room. It's complete with stuffed animals and real animals . . . Catness! At the time of this writing he's been back there about 3 hours.
He has stated that he'll be back there all day. We may have to bring lunch to him.
UPDATE: Its 2:19pm. Luke has been in the Fortress of Solitude for over 4 hours.