Happy Tuesday…riddle of the day: I have keys but no doors. I have space but no rooms, I allow you to enter but you are never able to leave. What am I?

Harry the Dirty Dog, written by Gene Zion. Harry is a white dog with black spots who loves everything…except baths. So one day before bath time, Harry runs away. https://www.storylineonline.net/books/harry-the-dirty-dog/