And recently they have started to play "house".
They live in the pantry, of course, because it's the only room that has a 5 pound bag of M&Ms. And it has an old-fashioned light bulb with a chain that they can pull on and off. Repeatedly.
The other day I overheard Linus telling Sadie that he was going to be the daddy and she was the mommy. Oh, and they did not have any children - good thing he was up-front about it in case there was any confusion.
I asked him if he and Sadie were married.
And he said, (these are his exact words):
Nope. We're just living together.
Duh.