President-elect Barack Obama and family launched his “Whistle-stop tour” at the 30th Street Station in Philadelphia on January 17th; the train-ride ended in D.C. While en route to D.C., the Obamas celebrated mom-elect Michelle Obama’s 45th birthday.

Via People
After the Baltimore rally, Mrs. Obama was greeted back aboard the train with a shrieked “Mommy!” as Malia reached up to cover her mother’s eyes and lead her into the birthday car. Malia dropped her hand and, as Mrs. Obama took in the surprise, a party hat-wearing Sasha jumped up and down and draped a lei over her mother’s neck while Malia took pictures. Someone cued a boombox and Mrs. Obama and her girls had a little impromptu dance party before the train pulled away.