Where did it go?

Where did it go?  It used to be that everything went in the mouth- now it goes through the "rabbit hole" to the basement steps when we're not looking.  But the bottom picture is the typical response we get when we ask her where her toy went! She loves to watch the cats go in and out of the door and watches them go all the way down the stairs and waits for them to come back up.  Every evening Christopher or I go down to the basement with a basket to bring up all the toys that were banished from the playroom!  Thank God she can't fit through the hole or we'd be in BIG trouble!