What does the Wonder Dome display after Andrew takes Sierra's library card?

After Andrew takes Sierra's card, the Wonder Dome dissolve out of Dewey Decimal mode and becomes a bright green bedroom. The room has red-framed windows looking out on a blue night sky with a full moon and a blanket of twinkling stars. In the great green room, there is a telephone, and a red balloon, and a picture of a cow jumping over the moon. The ceiling has become the bunny's bedroom from "Goodnight Moon."