Recent video shows the girl shopping for toys. Her father, Larry Birkhead, said that Dannielynn asked some tough questions about her mother when they visited the Bahamas, where Smith and her son, Daniel, are buried.
"Well, this time was a little tough because she has a little bit better understanding of things. You know, she said, 'Why did mommy die?' And I said, 'You know, they doctors couldn't fix her. But if you're good that, you know, you'll get to see her some day,'" Birkhead said.
Birkhead says he wants to keep Anna Nicole's image alive in a positive way for his daughter. Read more in his interview with ABC News at abcnews.go.com