It's hard to imagine what it's like when your dad becomes one of the most important men in the world.
But George Bush's daughters, Barbara and Jenna, went through it all when their dad became president.
They've been giving President Barack Obama's daughters some advice about living in the "magical place" called the White House.
The 27-year-old twins wrote a letter to Sasha, 7, and Malia, 10, which was printed in an American newspaper.
THIS is Sasha and Malia's new home!
Barbara and Jenna told the younger girls to make the most of their dad being president, and go everywhere and do everything they can.
They told Sasha and Malia to make sure they keep lots of friends around them, and cherish their pets.
They also had loads of fun advice, like telling the girls to slide down the banisters of the White House, and to make sure they play games and have swimming parties!
The twins also had some serious things to say in their letter.
"Here is our most important piece of advice: remember who your dad really is," they wrote.