"Malia and Sasha have that, too!" Mrs. Obama enthused to a boy at New Hampshire Estates Elementary School in Silver Spring, Md., who said he plays the exercise video game at home.
"At our house, we talk to our girls about exercise a lot," the First Lady continued. "One plays soccer, one plays basketball, they both play tennis. They go to the gym on a regular basis. They ride their bikes."
And this First Lady, whose signature cause is her "Let's Move" campaign against childhood obesity, proved that diplomatic teas are not her style. Instead, to kick off Tuesday's state visit by President Felipe Calderon and the First Lady of Mexico, Margarita Zavala, Mrs. Obama brought Mrs. Zavala to the suburban Washington school to take part in a 2nd-grade gym class.
Wearing a Calvin Klein shift, ballet flats and an elaborate bib necklace of gold, turquoise and crystal, Mrs. Obama gamely skipped, hopped and ran with the children.
"Who's breathing heavy?" the gym teacher asked. Mrs. Obama raised her hand, adding that next time, "Maybe I can wear jeans and sneakers."