There's a closet in Kit's room that we use for storing winter coats and things. They've never seen it open. Today X was holding them and opened the closet.
They spent the next several minutes looking around the room like "What the fuck ELSE is a door? Are there magic portals just fucking everywhere? Have you been keeping this from me this entire time?"
They looked at the ceiling. "Is THAT a door?"
X, helpfully: "Well, actually that part there slides open so you can get to the attic--"
R: "STOP TRAUMATIZING THE BABY."
J comes in. We explain what happened. Kit is still looking around, astonished and suspicious.
J: "Aw, they're looking at the ceiling wondering if there's a door there too. Actually, there is the entrance to the attic--"
R and X: "STOP TRAUMATIZING THE BABY."
Many things about fairy tales, Narnia, and the TARDIS suddenly become clear.