Fort!

Under the pillows, between the couch and ottoman, and through the blanket doors and you find the first official overnight fort of one Mr. Alex Thomas Julius.

He loved it.  I, of course, went to bed sad that he "isn't old enough to sleep by himself downstairs in the living room." ... The living room of our completely locked house.  ...  The living room that is a short hallway and 6 steps from my room.  Yep.  Pretty sure he's old enough.