Ten years have passed and Harry is almost eleven. On Dudley's birthday, the family plans an outing to the zoo. On family outings, Harry would normally be made to stay with a neighbor, Mrs. Figg. But Mrs. Figg broke her leg, and neither Vernon Dursley's sister Marge or her friend Yvonne can keep Harry so he has to go with Uncle Vernon, Aunt Petunia, Dudley and Dudley's best friend Piers Polkiss to the zoo. Harry talks to a boa constrictor (snake) and sets it free, making the glass from it's cage vanish.