Every sentence the character Pippi says in the movie consists of at least one word beginning with "P", the first letter of her name. Later on in the movie she meets a policeman named Quint who does the same but with the letter "Q", the first letter of his name.
When Janie and Billy enter Mr.Popper's "snowy" home, Janie has the keys in her right and her left hand is in her coat's pocket. A few seconds later, she throws a snowball to her dad. But, in those seconds, she didn't bowed to take some snow for snowball.