It was a swinging start to the day for the Obamas Sunday with both the president and his wife shaking a leg with children at the Holy Name School here as a Marathi folk tune played in the background. President Barack Obama and his wife Michelle, who landed here Saturday for a four-day India visit, were relaxed and smiling as they interacted with students, many of them from poor families, at the school. The couple arrived separately at the venue, in a quiet bylane in Colaba, a hub of foreigners and close to the Leopold Cafe, which was targeted during the Nov 26, 2008 Mumbai terror attacks.