Can you give me a summary for Chapter 3?

In Chapter Three, full of excitement with the prospect of Drake's surprise, Mr. Popper hardly sleeps that night. The next morning, he is already bored from having nothing to do, and he sits in a chair to read more of the book Antarctic Adventures. Just as he is settled in, the doorbell rings. There's a postman at the door with the biggest package Mr. Popper has ever seen. The box has instructions to "Unpack at Once" and "Keep Cool." Mr. Popper figures it is the package from Admiral Drake. He opens the box and hears a honking sound ("Ork!"). Startled, he rips the rest of the package open and discovers an Antarctic penguin. Mr. Popper is delighted.

The curious beast immediately begins to waddle around and inspect the rooms of the house. Mr. Popper fills the bathtub with cold water and the penguin takes a dip. Bill and Janie, the children, discover their father and the penguin and are similarly delighted and surprised. When asked by the children what the penguin's name is, Mr. Popper hears the penguin's cries ("Gook! Gook!") and settles on the imitative Cook, as in Captain Cook the explorer.