Nicole Kidman appreciates her adopted children's "need" to know their biological parents.

She told InTouch Weekly magazine: "Every family's experience with this is distinct and private. But we live in an ever more transparent world, technologically speaking. Kids are resourceful and the need to know your origin story is universal."

Meanwhile, the 49-year-old actress - who has Sunday, eight, and Faith, five, with her husband Keith Urban - previously revealed she loves spending time playing with her youngest children because it "brings back the child" in her.

Asked what she does in her free time, she said: "With an hour free, it depends. I love getting down on the floor and playing with my kids. I read an article that says it's so important to actually get down on their level and play with them for an hour a day. So I do that, and I love that. It brings back the child in me. With one minute, I'll daydream or meditate. I love just sitting quietly meditating."

And Nicole is very content with her family life at the moment, admitting she would have loved to have met Keith sooner so they could have had more children.

She added: "I wish I could have met him much earlier and had way more children with him. But I didn't. I mean, if I could have had two more children with him, that would have been just glorious. But as Keith says, 'The wanting mind, Nicole. Shut it down.'"