William told the Sandringham crowd: "We've had a good morning with George and I can't wait until next year when he's bigger."
Cicely Howard, 75, from Great Yarmouth, met Kate and asked about the baby.
She said: "She told me he was having a lovely day but was more interested in the wrapping paper than the presents."
More top news
A Malaysian court has found a man guilty of murdering two British medical students in Borneo.