Two patterns can be found in Kate's choice of charities: her concern for children and her interest in art, as the Duchess studied art history at St. Andrew's University.
The Art Room caters to both of those passions by using art as therapy for youths with low self-esteem.
Kate will celebrate her 30th birthday on Monday, but she's still a kid at heart. As a volunteer with the Scout Association, she will be "spending time privately with groups in North Wales and elsewhere."
Action on Addiction might represent the most unique choice, but a palace source reportedly told People that Kate believes addiction "lay at the heart of many of the social issues she was looking at."
Kate reportedly went through hundreds of requests before making her final decisions.