Scene: After dinner. Rosie's gone to the gym. The kids are playing in the living room while Pete tries to squeeze in a bit of MBA homework after a long day at work.
Daphne: Daddy, I'd like to make a sign for my door.
Pete: (looking at computer screen) Sure, sweetie, go ahead.
Daphne: Daddy, can I use this pen?
Pete: (looking at computer screen) Sure, baby.
Everyone goes about his/her business for several minutes. Upstairs for bath time, Daphne is eager to show her daddy the door signs she made.
With a Sharpie.
Authorized by Daddy.
(For the record, I don't share a room with James. "James just needs Mommy's help more")