via USA Today: Don't forget the sunscreen: It's summer travel time for the female members of the first family - they're headed to southern Africa this month.

First lady Michelle Obama announced Friday she will visit Johannesburg and Cape Town, South Africa and Gaborone, Botswana on June 21-26, accompanied by daughters Malia and Sasha, and by her mother, Marian Robinson.

Obama's office said the trip will be a continuation of the first lady's effort to encourage young people at home and abroad, a traditional first-lady project which Obama has taken up with zeal. World travel also is traditional for first ladies: Obama has already picked up a slew of stamps in her passport, with visits to Brazil, Chile, El Salvador, India and Mexico, not to mention the glittering capitals of Europe. Obama hopes to underscore America's continuing interest in the success of African nations and strengthen historic connections between Americans and Africans.

And it will be a pretty cool vacation for already intrepid travelers Malia, who turns 13 on July 4, and Sasha, who will turn 10 on June 10.