Which one of Abraham Lincoln's kids died in the White House?

Answer Willie (1850-62)

The third Lincoln child, Willie, was born on December 21, 1850, in the family home in Springfield. He was named for his Uncle William Wallace, who married Mary Todd Lincoln's sister Frances. Willie was described as being amiable, cheerful, mature for his age, and the son who was the most popular with his playmates. His mother said that Willie "was a very beautiful boy, with a most spiritual expression of face." However, the use of the word "spiritual" here does not mean that he was not ready to join his younger brother Tad in pranks and mischief whenever the occasion presented itself. He was the apple of his father's eye. Willie could do no wrong in his father's eyes. Willie died in the White House on February 20, 1862, at the age of 11, while his father was President. It was one of the sadest events in the White House. His death was a devastating blow to his parents, and it cast a dark shadow over the remaining years of Lincoln's Presidency, already made tragic by the Civil War. Lincoln grieved silently in his son's bedroom for 2 days. Mary wailed for days. The Lincolns had lost a son ealier. Eddie only lived to be 3 years and ten months old. After a long illness he died in the family home on February 1, 1850. Source: http://histclo.com/pres/ind19/lincoln/lin-child.html