- "Thirty-six. That's two less than last year!"
- —Dudley's tantrum on his eleventh birthday[src]
He received 36 presents, including a new computer, a second television, a remote control aeroplane, sixteen new computer games, a gold wristwatch, a video recorder, a cine-camera, a remote control, a racing bicycle, (which Harry found odd, as Dudley was very fat and hated exercise if it did not include punching someone), and more. When Dudley counted his presents, he was mortified that he had two fewer than his last birthday: he became very angry at being corrected even though there was still one less present. Petunia promised that when the family went out to the zoo, she would buy him two more presents so he would have one more than the year before.
- Harry Potter and the Philosopher's Stone (First appearance)
- Harry Potter and the Philosopher's Stone (film)