To commemorate Martin Luther King Jr. Day of Service, the first family participated in a service project at the D.C. Central Kitchen, a community kitchen, preparing meals for distribution to local shelters.
Obama, first lady Michelle Obama and daughter Malia and Sasha worked the line, preparing burritos along with other volunteers.
"I just want to thank everybody here for the great work they do," Obama said, noting it was the kitchen's 25th anniversary.
Obama also tracked inventory -- shouting down the line that burritos were running low. Answered what was inside the burrito, he said it was either lamb or beef, then settling on beef.
Biden joined members of the Catholic Volunteer Network, serving hot lunches to guests at So Others Might Eat in Washington.
He also spoke at the National Action Network's Annual Martin Luther King Jr. Day Breakfast.
"It's the everyday actions that inspire that are going to keep human progress rolling forward and keep it from sliding back," Biden said.
Members of Obama's Cabinet also participated in the Day of Service, including Treasury Secretary Jack Lew sorting and packing clothing for homeless veterans and Commerce Secretary Penny Pritzker serving food at Food and Friends, a Washington organization that prepares and delivers meals and groceries to people living with HIV/AIDS, cancer and other catastrophic illnesses.