Qubit cocks his head, mildly nonplussed. "Well... yes. Don't you remember? I told you I was working on it."

He did consider making it a surprise, at the start, but soon decided against it. For one thing, Carlisle's not a fan of surprises as a rule - but for another, it'd be tough to build a decent simulation of a place he knows nothing about. And who better to ask for the specs than the place's owner?

"It's the house," he explains simply.

(You know. The house. The house belonging to Carlisle, the house Carlisle lived and died in, Carlisle's house. That house.)