According to The Sun, the theme of the book was "Den They Were Three".
“It’s taken a great deal of time and effort to make, and as a present, it means something," The Sun's source said. "You could say it’s a reminder to William about what is really important. It’s been put together with a great deal of care."
The scrapbook was put together by Kate over the past year "as the pictures came along from the children," the source said. “She’s been very much guiding it. It is not something that she’s put together retrospectively. It was compiled gradually.”
News of the gift comes just weeks after reports surfaced about how Rose Hanbury affair rumours have changed the couple's relationship. “It forced her and William to sit back and examine their relationship, which they realized they should have been doing more often," a friend told Us Weekly.
WATCH: The Queen, Kate, Harry and Meghan Arrive At Trooping the Colour.