Creativity with Limits

Henry has been very imaginative recently - and it's been a blast as he colors the inside of a box that serves first as a train, then the space shuttle (even though it isn't white, he reminds us). Last night he was swimming to his bed/boat. It was fun. Once in the bed/boat he informed us that there is a shark in the river. We were amazed, then Daddy announced that that's ok because the alligator will eat the shark. Then, next thing we know, Daddy reports that there are multiple sharks and alligators in the river.
Looking concerned, Henry said, "It's just a floor, Daddy."