Early morning at Olathe, Kan.’s Santa Marta Senior Living Center, a dozen white-haired men and women are finishing the last dregs of their breakfast coffee, sharing stories and lots of laughs.
So much it sounds like a laugh track.
But among the deeper, throatier chortles, there is one high-pitched giggle belonging to fifth-grader Michelle Meyer. On this day, she’s showing these oldsters all the tricks of her new smartphone, including some funny YouTube classics.
At 10, the girl with the…