He smiles and kisses her back.

"Love you too."

He returns to designing the body, deciding to design some new wheels to go with it.  As she is drifting off on his lap he grabs her and picks her up, carrying her to the bedroom to lay her down, by this time everybody else is already asleep.  He grabs the 3D printer out and brings it back to the toy room.  He hooks it up and starts printing the body.  He closes the door and returns to the bedroom to lay down, falling asleep soon after.