(AP Photo/Carolyn Kaster)

DALLAS - Michelle Obama says her daughters' main concern about the coming presidential election is all about them.

In an interview Friday in Dallas, Mrs. Obama said a child in a campaign always asks, "What happens in my life?"

The first lady says she's trying to assure 10-year-old Sasha and 13-year-old Malia that they'll be fine, no matter what happens.

And she says she tells them it's their choice to be part of their father's re-election campaign or to stay far from it.

Mrs. Obama says her girls enjoyed going on campaign trips during the 2008 election because people gave them ice cream everywhere they went.

The first lady was in Dallas to mark the second anniversary of her "Let's Move" campaign against childhood obesity.